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3   <title>
4    First steps with SAXO
5  </title><link rel="stylesheet" href="saxo.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.70.1"><meta name="keywords" content="IDL, SAXO"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="article" lang="en"><div class="titlepage"><div><div><h2 class="title"><a name="d0e3"></a>
6    First steps with <span class="application">SAXO</span>
7  </h2></div><div><div class="authorgroup"><div class="author"><h3 class="author"><span class="firstname">S&eacute;bastien</span> <span class="surname">Masson</span></h3><code class="email">&lt;<a href="mailto:smasson_at_locean-ipsl.upmc.fr">smasson_at_locean-ipsl.upmc.fr</a>&gt;</code></div><div class="author"><h3 class="author"><span class="firstname">Fran&ccedil;oise</span> <span class="surname">Pinsard</span></h3><code class="email">&lt;<a href="mailto:Francoise.Pinsard_at_locean-ipsl.upmc.fr">Francoise.Pinsard_at_locean-ipsl.upmc.fr</a>&gt;</code></div></div></div><div><div class="revhistory"><table border="1" width="100%" summary="Revision history"><tr><th align="left" valign="top" colspan="2"><b>Revision History</b></th></tr><tr><td align="left">Revision 0.0</td><td align="left">29 July 2005</td></tr><tr><td align="left" colspan="2">First draft</td></tr><tr><td align="left">Revision 0.1</td><td align="left">29 August 2005</td></tr><tr><td align="left" colspan="2">last Japanese version!</td></tr><tr><td align="left">Revision 0.2</td><td align="left">May 2006</td></tr><tr><td align="left" colspan="2">split with getsaxo</td></tr></table></div></div></div><hr></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="sect1"><a href="#first_plots">1.
8      First plots...
9    </a></span></dt><dd><dl><dt><span class="sect2"><a href="#start_with_init">1.1.
10        Start IDL session: <strong class="userinput"><code><span><strong class="command">@init</strong></span></code></strong>
11      </a></span></dt><dt><span class="sect2"><a href="#basic_plots">1.2.
12        basic plots...
13      </a></span></dt></dl></dd><dt><span class="sect1"><a href="#gridded_data">2.
14      Explore gridded data (model outputs and observations)
15    </a></span></dt><dd><dl><dt><span class="sect2"><a href="#load_grid">2.1.
16        Load the data grid
17      </a></span></dt><dt><span class="sect2"><a href="#plt">2.2.
18        horizontal plots and maps
19      </a></span></dt><dt><span class="sect2"><a href="#pltz">2.3.
20        vertical sections
21      </a></span></dt><dt><span class="sect2"><a href="#pltt">2.4.
22        hovmoellers and time series
23      </a></span></dt><dt><span class="sect2"><a href="#plt1d">2.5.
24        1D plots
25      </a></span></dt></dl></dd></dl></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="first_plots"></a>1.&nbsp;
26      First plots...
27    </h2></div></div></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="start_with_init"></a>1.1.&nbsp;
28        Start IDL session: <strong class="userinput"><code><span><strong class="command">@init</strong></span></code></strong>
29      </h3></div></div></div><p>
30        Each IDL session using <span class="application">SAXO</span> must always start with: <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">@init</strong></span></code></strong>.     
31      </p><p>
32        <span class="emphasis"><em>The @ is equivalent to an include. It is used to execute a set of IDL commands that will be directly executed without any compilation (as it is the case for a procedure or a function). All variables defined and used in the @... file will still be accessible after the execution of the @... is finished (which is not the case for procedures and functions that ends with the return instruction).</em></span>
33        </p><pre class="screen">
34  <code class="prompt">$</code> <strong class="userinput"><code><span><strong class="command">cd</strong></span> <code class="filename"><code class="envar">${HOME}</code>/My_IDL/</code></code></strong>
35  <code class="prompt">$</code> <strong class="userinput"><code><span><strong class="command">idl</strong></span></code></strong>
36  <code class="computeroutput">IDL Version 6.0, Mac OS X (darwin ppc m32). (c) 2003, Research Systems, Inc.</code>
37  <code class="computeroutput">Installation number: 35411.</code>
38  <code class="computeroutput">Licensed for personal use by Jean-Philippe BOULANGER only.</code>
39  <code class="computeroutput">All other use is strictly prohibited.</code>
40  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">@init</strong></span></code></strong>
41  <code class="computeroutput">% Compiled module: KEEP_COMPATIBILITY.</code>
42  <code class="computeroutput">% Compiled module: FIND.</code>
43  <code class="computeroutput">% Compiled module: PATH_SEP.</code>
44  <code class="computeroutput">% Compiled module: STRSPLIT.</code>
45  <code class="computeroutput">% Compiled module: DEF_MYUNIQUETMPDIR.</code>
46  <code class="computeroutput">We forget the compatibility with the old version</code>
47  <code class="computeroutput">% Compiled module: DEMOMODE_COMPATIBILITY.</code>
48  <code class="computeroutput">% Compiled module: ISADIRECTORY.</code>
49  <code class="computeroutput">% Compiled module: LCT.</code>
50  <code class="computeroutput">% Compiled module: RSTRPOS.</code>
51  <code class="computeroutput">% Compiled module: REVERSE.</code>
52  <code class="computeroutput">% Compiled module: STR_SEP.</code>
53  <code class="computeroutput">% Compiled module: LOADCT.</code>
54  <code class="prompt">idl&gt;</code>
55        </pre><p>
56        As an IDL session using <span class="application">SAXO</span> must always start with <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">@init</strong></span></code></strong>, it could be convenient to define the environment variable <code class="envar">IDL_STARTUP</code> to <code class="filename"><code class="envar">${HOME}</code>/My_IDL/init.pro</code>. In that way, <code class="filename">init.pro</code> will automatically been executed when starting IDL. This can be done with the following command:
57      </p><div class="variablelist"><dl><dt><span class="term"><span><strong class="command">csh</strong></span></span></dt><dd><pre class="screen"><code class="prompt">$</code> <strong class="userinput"><code><span><strong class="command">setenv</strong></span> <code class="envar">IDL_STARTUP</code> <code class="filename"><code class="envar">${HOME}</code>/My_IDL/init.pro</code></code></strong></pre></dd><dt><span class="term"><span><strong class="command">ksh</strong></span></span></dt><dd><pre class="screen"><code class="prompt">$</code> <strong class="userinput"><code><span><strong class="command">export</strong></span> <code class="envar">IDL_STARTUP</code>=<code class="filename"><code class="envar">${HOME}</code>/My_IDL/init.pro</code></code></strong></pre></dd></dl></div><p>
58      </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="basic_plots"></a>1.2.&nbsp;
59        basic plots...
60      </h3></div></div></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="basic_splot"></a>1.2.1.&nbsp;
61        splot
62      </h4></div></div></div><p>
63        </p><div class="screenco"><pre class="screen">
64   <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">n = 10</strong></span></code></strong>
65   <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">y = findgen(n)</strong></span></code></strong> <img src="images/callouts/1.png?format=raw" alt="1">
66   <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">plot, y</strong></span></code></strong> <a href="figpng/basic_plot.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
67        </pre><div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><img src="images/callouts/1.png?format=raw" alt="1" border="0"></td><td valign="top" align="left"><p>
68                <span><strong class="command">findgen</strong></span> stands for
69<span class="bold"><strong>f</strong></span>loat <span class="bold"><strong>ind</strong></span>ex <span class="bold"><strong>gen</strong></span>erator.
70                </p><pre class="screen">
71  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">print, findgen(6)</strong></span></code></strong>
72  <code class="computeroutput">      0.00000      1.00000      2.00000      3.00000      4.00000      5.00000</code>
73                </pre><p>
74              </p></td></tr></table></div></div><p>
75     </p><p>
76        Using IDL <span><strong class="command">plot</strong></span> command is quite inconvenient to save the figure as a postscript. In addition, positioning the figure on the window/page by using <code class="varname">!p.position</code>, <code class="varname">!p.region</code> and <code class="varname">!p.multi</code> is often a nightmare. That's why we developed <span><strong class="command">splot</strong></span> (like super-plot) which can be used in the same way as plot but is much more convenient to make postscript and position the figure.
77        </p><pre class="screen">
78  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">splot, y</strong></span></code></strong> <a href="figpng/basic_splot1.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
79  <code class="computeroutput">% Compiled module: SPLOT.</code>
80  <code class="computeroutput">% Compiled module: REINITPLT.</code>
81  <code class="computeroutput">% Compiled module: PLACEDESSIN.</code>
82  <code class="computeroutput">% Compiled module: CALIBRE.</code>
83  <code class="computeroutput">% Compiled module: GIVEWINDOWSIZE.</code>
84  <code class="computeroutput">% Compiled module: GET_SCREEN_SIZE.</code>
85  <code class="computeroutput">% Compiled module: TERMINEDESSIN.</code>
86        </pre><p>
87        Save the figure seen on the screen as a (real, not a screen capture) postscript in only one command.
88        </p><div class="screenco"><pre class="screen">
89  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">@ps</strong></span></code></strong>
90  <code class="computeroutput">% Compiled module: GETFILE.</code>
91  <code class="computeroutput">% Compiled module: PUTFILE.</code>
92  <code class="computeroutput">% Compiled module: OPENPS.</code>
93  <code class="computeroutput">% Compiled module: XQUESTION.</code>
94  <code class="computeroutput">Name of the postscript file? (default answer is idl.ps) </code><strong class="userinput"><code>first_ps</code></strong> <img src="images/callouts/1.png?format=raw" alt="1">
95  <code class="computeroutput">% Compiled module: ISAFILE.</code>
96  <code class="computeroutput">% Compiled module: XNOTICE.</code>
97  <code class="computeroutput">% Compiled module: CLOSEPS.</code>
98  <code class="computeroutput">% Compiled module: PRINTPS.</code>
99  <code class="computeroutput">% Compiled module: FILE_WHICH.</code>
100  <code class="computeroutput">% Compiled module: CW_BGROUP.</code>
101  <code class="computeroutput">% Compiled module: XMANAGER.</code>
102        </pre><div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><img src="images/callouts/1.png?format=raw" alt="1" border="0"></td><td valign="top" align="left"><p>
103                <em><span class="remark">If needed, the name of the postscript will automatically be completed with .ps. Just hit return, if you want to use the default postscript name: <code class="filename">idl.ps</code>.</span></em> 
104              </p></td></tr></table></div></div><p>
105        Check that the &#8220;<span class="quote"><code class="filename">first_ps.ps</code></span>&#8221; file is now existing...
106        </p><pre class="screen">
107  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">print, file_test(psdir + 'first_ps.ps')</strong></span></code></strong>
108  <code class="computeroutput">           1</code>
109  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">help, file_info(psdir + 'first_ps.ps'), /structure</strong></span></code></strong>
110  <code class="computeroutput">** Structure FILE_INFO, 21 tags, length=64, data length=63:</code>
111  <code class="computeroutput">   NAME            STRING    '/Users/sebastie/IDL/first_ps.ps'</code>
112  <code class="computeroutput">   EXISTS          BYTE         1</code>
113  <code class="computeroutput">   READ            BYTE         1</code>
114  <code class="computeroutput">   WRITE           BYTE         1</code>
115  <code class="computeroutput">   EXECUTE         BYTE         0</code>
116  <code class="computeroutput">   REGULAR         BYTE         1</code>
117  <code class="computeroutput">   DIRECTORY       BYTE         0</code>
118  <code class="computeroutput">   BLOCK_SPECIAL   BYTE         0</code>
119  <code class="computeroutput">   CHARACTER_SPECIAL</code>
120  <code class="computeroutput">                   BYTE         0</code>
121  <code class="computeroutput">   NAMED_PIPE      BYTE         0</code>
122  <code class="computeroutput">   SETUID          BYTE         0</code>
123  <code class="computeroutput">   SETGID          BYTE         0</code>
124  <code class="computeroutput">   SOCKET          BYTE         0</code>
125  <code class="computeroutput">   STICKY_BIT      BYTE         0</code>
126  <code class="computeroutput">   SYMLINK         BYTE         0</code>
127  <code class="computeroutput">   DANGLING_SYMLINK</code>
128  <code class="computeroutput">                   BYTE         0</code>
129  <code class="computeroutput">   MODE            LONG               420</code>
130  <code class="computeroutput">   ATIME           LONG64                1122424373</code>
131  <code class="computeroutput">   CTIME           LONG64                1122424373</code>       
132  <code class="computeroutput">   MTIME           LONG64                1122424373</code>       
133  <code class="computeroutput">   SIZE            LONG64                      4913</code>
134        </pre><p>
135      </p><p><a name="splot_description"></a>
136        <span><strong class="command">splot</strong></span> accepts the same keywords as <span><strong class="command">plot</strong></span> (<code class="computeroutput"><a name="plot_kwd"></a>/ISOTROPIC, MAX_VALUE=value, MIN_VALUE=value, NSUM=value, /POLAR, THICK=value, /XLOG, /YLOG, /YNOZERO</code>), including the graphics keywords (<code class="computeroutput"><a name="gr_kwd"></a>BACKGROUND, CHARSIZE, CHARTHICK, CLIP, COLOR, DATA, DEVICE, FONT, LINESTYLE, NOCLIP, NODATA, NOERASE, NORMAL, POSITION, PSYM, SUBTITLE, SYMSIZE, T3D, THICK, TICKLEN, TITLE, [XYZ]CHARSIZE, [XYZ]GRIDSTYLE, [XYZ]MARGIN, [XYZ]MINOR, [XYZ]RANGE, [XYZ]STYLE, [XYZ]THICK, [XYZ]TICKFORMAT, [XYZ]TICKINTERVAL, [XYZ]TICKLAYOUT, [XYZ]TICKLEN, [XYZ]TICKNAME, [XYZ]TICKS, [XYZ]TICKUNITS, [XYZ]TICKV, [XYZ]TICK_GET, [XYZ]TITLE, ZVALUE</code>).
137      </p><p>
138        It can therefore be customized <span class="emphasis"><em>as much as you want</em></span>. See this short example:
139      </p><p>
140        </p><pre class="screen">
141  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">splot, y, y^2, linestyle = 2, thick = 2, title = 'y = x^2', /portrait</strong></span></code></strong> <a href="figpng/basic_splot2.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
142        </pre><p>
143        <span><strong class="command">splot</strong></span> can be used to setup the graphic environment (<code class="varname">!p</code>, <code class="varname">!x</code>, <code class="varname">!y</code>, <code class="varname">!z</code> variables) needed by procedures like <span><strong class="command">oplot</strong></span>
144        </p><pre class="screen">
145  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">splot, y, yrange = [0, (n-1)^2], title = 'x and x^2'</strong></span></code></strong>
146  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">oplot, y^2, color = 50, linestyle = 2</strong></span></code></strong> <a href="figpng/basic_splot4.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
147        </pre><p>
148        Use the keyword small to produce multi plots figures.
149        </p><div class="screenco"><pre class="screen">
150  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">splot, y, y^2, title = 'y = x^2', psym = 2, small <span class="inlinemediaobject"><img src="images/callouts/1.png?format=raw" alt="1"></span> = [1, 2, 1]</strong></span></code></strong>
151  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">splot, findgen(360)/36., findgen(360)*2.*!dtor, /polar $</strong></span></code></strong>
152  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">    , small <span class="inlinemediaobject"><img src="images/callouts/1.png?format=raw" alt="1"></span> = [1, 2, 2], /noerase <span class="inlinemediaobject"><img src="images/callouts/2.png?format=raw" alt="2"></span></strong></span></code></strong> <a href="figpng/basic_splot3.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
153        </pre><div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><img src="images/callouts/1.png?format=raw" alt="1" border="0"></td><td valign="top" align="left"><p>
154                the <code class="computeroutput">small</code> keyword is a 3 elements vector which defines how we divide the page and in which case we should make the plot: [number of columns, number of rows, case number]. The case numbering is starting at 1, from top to bottom and left to right.
155              </p></td></tr><tr><td width="5%" valign="top" align="left"><img src="images/callouts/2.png?format=raw" alt="2" border="0"></td><td valign="top" align="left">
156                you must put <code class="computeroutput">/noerase</code> otherwise the second plot will be done in a new window.
157              </td></tr></table></div></div><p>
158      </p></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="basic_contour"></a>1.2.2.&nbsp;
159        scontour
160      </h4></div></div></div><p>
161        Following <span><strong class="command"><a href="#basic_splot" title="1.2.1.&nbsp;&#xA;splot&#xA;      ">splot</a></strong></span> example, we provide <span><strong class="command">scontour</strong></span> as a "super <span><strong class="command">contour</strong></span>".
162        </p><pre class="screen">
163  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">z = dist(n)</strong></span></code></strong>
164  <code class="computeroutput">% Compiled module: DIST.</code>
165  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">scontour, z</strong></span></code></strong> <a href="figpng/basic_scontour1.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
166  <code class="computeroutput">% Compiled module: SCONTOUR.</code>
167  <code class="computeroutput">% Compiled module: CHKSTRU.</code>
168        </pre><p>
169        <span><strong class="command">scontour</strong></span> accepts the same keywords as <span><strong class="command">contour</strong></span> (<code class="computeroutput">C_ANNOTATION=vector_of_strings, C_CHARSIZE=value, C_CHARTHICK=integer, C_COLORS=vector, C_LABELS=vector{each element 0 or 1}, C_LINESTYLE=vector, { /FILL | /CELL_FILL | C_ORIENTATION=degrees}, C_SPACING=value, C_THICK=vector, /CLOSED, /DOWNHILL, /FOLLOW, /IRREGULAR, /ISOTROPIC, LEVELS=vector, NLEVELS=integer{1 to 60}, MAX_VALUE=value, MIN_VALUE=value, /OVERPLOT, {/PATH_DATA_COORDS, PATH_FILENAME=string, PATH_INFO=variable, PATH_XY=variable}, TRIANGULATION=variable, /PATH_DOUBLE, /XLOG, /YLOG, ZAXIS={0 | 1 | 2 | 3 | 4}</code>), including the <a href="#gr_kwd">graphics keywords</a> (except <code class="computeroutput">LINESTYLE, PSYM, SYMSIZE</code>).
170      </p><p>It can therefore be customized <span class="emphasis"><em>as much as you want</em></span>. See these short examples:</p><p>
171        </p><pre class="screen">
172  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">scontour, z, /fill, nlevels = 15, subtitle = 'nicer contour' $</strong></span></code></strong>
173  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">    , xtitle = 'x index', charsize = 1.5</strong></span></code></strong> <a href="figpng/basic_scontour2.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
174        </pre><p>
175It can be used in combinaison with contour to make more complex plots:
176        </p><div class="screenco"><pre class="screen">
177  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">ind = findgen(2*n)/(2.*n)</strong></span></code></strong>
178  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">scontour, z, levels = n*ind, c_orientation = 180*ind, c_spacing = 0.4*ind</strong></span></code></strong>
179  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">contour, z, /overplot, c_label = rebin([1, 0], 2, n) <span class="inlinemediaobject"><img src="images/callouts/1.png?format=raw" alt="1"></span>, levels = n*ind $</strong></span></code></strong>
180  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">    , c_charthick = 2, c_charsize = 1.5, c_colors = 250*ind</strong></span></code></strong> <a href="figpng/basic_scontour3.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
181        </pre><div class="calloutlist"><table border="0" summary="Callout list"><tr><td width="5%" valign="top" align="left"><img src="images/callouts/1.png?format=raw" alt="1" border="0"></td><td valign="top" align="left"><p>
182              <span><strong class="command">rebin</strong></span> is used to build an array containing an alternation of 1 and 0 in order to label one contour every two contours.
183                </p><pre class="screen">
184  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">print, rebin([1, 0], 2, 3)</strong></span></code></strong>
185  <code class="computeroutput">       1       0</code>
186  <code class="computeroutput">       1       0</code>
187  <code class="computeroutput">       1       0</code>
188                </pre><p>
189            </p></td></tr></table></div></div><p>
190        <span><strong class="command">scontour</strong></span> is compatible with the positioning method associated with the <code class="computeroutput">small</code> keyword. See for example the test file <a href="../../Tests/tst_basic.pro?format=raw" target="_top"><code class="filename">tst_basic.pro</code></a>:
191        </p><pre class="screen">
192  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">tst_basic</strong></span></code></strong> <a href="figpng/tst_basic.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
193        </pre><p>
194      </p></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="tvplus"></a>1.2.3.&nbsp;
195          Quick look at 2D arrays: tvplus
196        </h4></div></div></div><p>
197          <span><strong class="command">tvplus</strong></span> is a enhanced version of tvscl and allow you to have a quick look and perform basic exploration of 2D arrays.
198          </p><pre class="screen">
199            <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">tvplus, dist(20)</strong></span></code></strong> <a href="figpng/tvplus.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a>
200  <code class="computeroutput">left button  : mouse position and associated array value</code>
201  <code class="computeroutput">middle button: use it twice to define a zoom box</code>
202  <code class="computeroutput">right button : quit</code>
203  <code class="computeroutput">(x, y) = (  5,   5), value = 7.07107</code>
204  <code class="computeroutput">(x, y) = ( 12,   8), value = 11.3137</code>
205          </pre><p>
206          For more informations on <span><strong class="command">tvplus</strong></span>, try:
207          </p><pre class="screen">
208  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">xhelp, 'tvplus'</strong></span></code></strong>
209          </pre><p>
210        </p></div></div></div><div class="sect1" lang="en"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="gridded_data"></a>2.&nbsp;
211      Explore gridded data (model outputs and observations)
212    </h2></div></div></div><p>
213      This section briefly describes the main functionalities offered by SAXO to explore gridded data on regular or irregular grid.
214    </p><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="load_grid"></a>2.1.&nbsp;
215        Load the data grid
216      </h3></div></div></div><p>
217        As we focus in this section on the gridded data, we must first load the grid informations before reading and plotting the data. Loading the grid independently of the data allow you to reload the grid only when it is strictly necessary and not every time you access the data. In <code class="filename"><code class="envar">${HOME}</code>/SAXO_DIR/Tests/</code>, we provide several examples to load a grid.
218      </p><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="load_fromdata"></a>2.1.1.&nbsp;
219          Easiest solution: load data grid (regular or not) directly from the data file.
220        </h4></div></div></div><p>
221          Example of Levitus temperature on a regular 1x1 grid.
222          </p><pre class="screen">
223  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">@tst_initlev</strong></span></code></strong>
224  <code class="computeroutput">% Compiled module: INITNCDF.</code>
225  <code class="computeroutput">% Compiled module: ISAFILE.</code>
226  <code class="computeroutput">% Compiled module: UNIQ.</code>
227  <code class="computeroutput">% Loaded DLM: NCDF.</code>
228  <code class="computeroutput">% Compiled module: COMPUTEGRID.</code>
229  <code class="computeroutput">% Compiled module: DOMDEF.</code>
230  <code class="computeroutput">% Compiled module: INTER.</code>
231  <code class="computeroutput">% Compiled module: TRIANGULE.</code>
232  <code class="computeroutput">% Compiled module: TRIANGULE_C.</code>
233  <code class="computeroutput">% Compiled module: UNDEFINE.</code>
234  <code class="computeroutput">% Compiled module: TESTVAR.</code>
235  <code class="computeroutput">% Compiled module: DIFFERENT.</code>
236  <code class="computeroutput">% Compiled module: DEFINETRI.</code>
237          </pre><p>
238          This <a href="../../Tests/tst_initlev.pro?format=raw" target="_top"><span><strong class="command">@tst_initlev</strong></span></a> command allows us to define:
239          </p><div class="itemizedlist"><ul type="disc"><li>domain dimensions, stored in <code class="varname">jpi, jpj and jpk</code></li><li>points abscissa, stored in 2D array <code class="varname"></code>glamt</li><li>points ordinates, stored in 2D array <code class="varname"></code>gphit</li><li>points depths, stored in 1D array <code class="varname"></code>gdept</li><li>cells corners abscissa, stored in 2D array <code class="varname"></code>glamf</li><li>cells corners ordinates, stored in 2D array <code class="varname"></code>gphif</li><li>cells upper boundary depth, stored in 1D array <code class="varname"></code>gdepw</li><li>land-sea mask, stored in <code class="varname"></code>tmask</li><li>the cells size in the longitudinal direction, stored in 2D array <code class="varname"></code>e1t</li><li>the cells size in the latitudinal direction, stored in 2D array <code class="varname"></code>e2t</li><li>the cells size in the vertical direction, stored in 1D array <code class="varname"></code>e3t</li><li>the triangulation used to fill the land points, stored in <code class="varname"></code>triangles_list</li></ul></div><p>
240
241          </p><pre class="screen">
242  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">help, jpi,jpj,jpk</strong></span></code></strong>
243  <code class="computeroutput">JPI (LOCAL_COORD)   LONG      =          360</code>
244  <code class="computeroutput">JPJ (LOCAL_COORD)   LONG      =          180</code>
245  <code class="computeroutput">JPK (LOCAL_COORD)   LONG      =           33</code>
246  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">help, glamt, gphit,glamf, gphif</strong></span></code></strong>
247  <code class="computeroutput">GLAMT (LONGITUDES)  FLOAT     = Array[360, 180]</code>
248  <code class="computeroutput">GPHIT (LATITUDES)   FLOAT     = Array[360, 180]</code>
249  <code class="computeroutput">GLAMF (LONGITUDES)  FLOAT     = Array[360, 180]</code>
250  <code class="computeroutput">GPHIF (LATITUDES)   FLOAT     = Array[360, 180]</code>
251  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">help, gdept, gdepw</strong></span></code></strong>
252  <code class="computeroutput">GDEPT (VERTICAL)    FLOAT     = Array[33]</code>
253  <code class="computeroutput">GDEPW (VERTICAL)    FLOAT     = Array[33]</code>
254  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">help, e1t, e2t, e3t</strong></span></code></strong>
255  <code class="computeroutput">E1T (SCALE_FACTORS) FLOAT     = Array[360, 180]</code>
256  <code class="computeroutput">E2T (SCALE_FACTORS) FLOAT     = Array[360, 180]</code>
257  <code class="computeroutput">E3T (VERTICAL)      FLOAT     = Array[33]</code>
258  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">help, tmask</strong></span></code></strong>
259  <code class="computeroutput">TMASK (MASKS)       BYTE      = Array[360, 180, 33]</code>
260  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">help, triangles_list</strong></span></code></strong>
261  <code class="computeroutput">TRIANGLES_LIST (LIEES_A_TRIANGULE) LONG      = Array[3, 128880]</code>
262  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">tvplus, glamt*tmask[*,*,0]</strong></span></code></strong>
263  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">tvplus, gphit*tmask[*,*,0]</strong></span></code></strong>
264          </pre><p>
265          We provide other initialization methods/examples
266          </p><div class="itemizedlist"><ul type="disc"><li><a href="../../Tests/tst_initorca2_short.pro?format=raw" target="_top">@tst_initorca2_short</a> : ORCA2 example</li><li><a href="../../Tests/tst_initorca05_short.pro?format=raw" target="_top">@tst_initorca05_short</a> : ORCA05 example</li><li><a href="../../Tests/tst_initlev_stride.pro?format=raw" target="_top">@tst_initlev_stride</a> : same as @tst_initlev but we skip on point over 2 in x and y direction</li><li><a href="../../Tests/tst_initorca2_short_stride.pro?format=raw" target="_top">@tst_initorca2_short_stride</a> : ORCA2 with stride</li><li><a href="../../Tests/tst_initorca05_short_stride.pro?format=raw" target="_top">@tst_initorca05_short_stride</a> : ORCA05 with stride</li><li><a href="../../Tests/tst_initlev_index.pro?format=raw" target="_top">@tst_initlev_index</a> : in that case we load the grid using points index as axis instead of the longitude/latitude position</li><li><a href="../../Tests/tst_initorca2_index.pro?format=raw" target="_top">@tst_initorca2_index</a> : load ORCA2 as it see by the model</li><li><a href="../../Tests/tst_initorca05_index.pro?format=raw" target="_top">@tst_initorca05_index</a> : load ORCA05 as it see by the model</li><li><a href="../../Tests/tst_initlev_index_stride.pro?format=raw" target="_top">@tst_initlev_index_stride</a> : @tst_initlev_index with stride</li><li><a href="../../Tests/tst_initorca2_index_stride.pro?format=raw" target="_top">@tst_initorca2_index_stride</a> : ORCA2 in index with stride</li><li><a href="../../Tests/tst_initorca05_index_stride.pro?format=raw" target="_top">@tst_initorca05_index_stride</a> : ORCA05 in index with stride</li></ul></div><p>
267        </p></div><div class="sect3" lang="en"><div class="titlepage"><div><div><h4 class="title"><a name="load_meshmask"></a>2.1.2.&nbsp;
268          Load the grid from OPA <code class="filename">meshmask</code> file
269        </h4></div></div></div><p>
270          When the grid is really irregular (its abscissa and ordinate cannot be descried by a vector), loading the grid directly from the data forces us to make an approximation when computing the grid corners position and the cells size. In that case, it can be preferable to load the grid from the meshmask file created by OPA. As OPA use a Arakawa-C discretization, loading the grid from the meshmask will also define all parameters related to the U, V and F grids (glam[uv],gphi[uv], e[12][uvf]). Note that, when using a simple <a href="#load_fromdata" title="2.1.1.&nbsp;&#xA;  Easiest solution: load data grid (regular or not) directly from the data file.&#xA;">grid definition from the data itself</a> (with <code class="filename">initncdf</code> or <code class="filename">computegrid</code>), adding the keyword /FULLCGRID leads also to the definition of all U, V and F grids parameters. There is the examples to load ORCA grids from OPA meshmask.
271          </p><div class="itemizedlist"><ul type="disc"><li><a href="../../Tests/tst_initorca2.pro?format=raw" target="_top">@tst_initorca2</a> : ORCA2</li><li><a href="../../Tests/tst_initorca05.pro?format=raw" target="_top">@tst_initorca05</a> : ORCA05</li><li><a href="../../Tests/tst_initorca2_stride.pro?format=raw" target="_top">@tst_initorca2_stride</a> : ORCA2 with stride</li><li><a href="../../Tests/tst_initorca05_stride.pro?format=raw" target="_top">@tst_initorca05_stride</a> : ORCA05 with stride</li><li><a href="../../Tests/tst_initorca2_index.pro?format=raw" target="_top">@tst_initorca2_index</a> : load ORCA2 as it see by the model</li><li><a href="../../Tests/tst_initorca05_index.pro?format=raw" target="_top">@tst_initorca05_index</a> : load ORCA05 as it see by the model</li><li><a href="../../Tests/tst_initorca2_index_stride.pro?format=raw" target="_top">@tst_initorca2_index_stride</a> : ORCA2 in index with stride</li><li><a href="../../Tests/tst_initorca05_index_stride.pro?format=raw" target="_top">@tst_initorca05_index_stride</a> : ORCA05 in index with stride</li></ul></div><p>
272        </p></div></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="plt"></a>2.2.&nbsp;
273        horizontal plots and maps
274      </h3></div></div></div><p>
275          A quick presentation of horizontal plots and maps is shown in <a href="../../Tests/tst_plt.pro?format=raw" target="_top">tst_plt</a>. After loading any of the grid (for example with one of the <a href="#load_grid" title="2.1.&nbsp;&#xA;Load the data grid&#xA;      ">above examples</a>). Just try:
276          </p><pre class="screen">
277  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">tst_plt</strong></span></code></strong>
278          </pre><p>
279        </p><p><span class="emphasis"><em>Beware, the command is <span><strong class="command">tst_plt</strong></span> and not <span><strong class="command">@tst_plt</strong></span> as <code class="filename">tst_plt.pro</code> is a procedure and not an include.</em></span></p><p>
280          See the results with
281          </p><div class="itemizedlist"><ul type="disc"><li><span><strong class="command">@tst_initlev</strong></span> <a href="figpng/tst_plt_lev_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca2</strong></span> <a href="figpng/tst_plt_orca2_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca05</strong></span> <a href="figpng/tst_plt_orca05_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initlev_stride</strong></span> <a href="figpng/tst_plt_lev_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_lev_stride_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca2_stride</strong></span> <a href="figpng/tst_plt_orca2_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca2_stride_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca05_stride</strong></span> <a href="figpng/tst_plt_orca05_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_plt_orca05_stride_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li></ul></div><p>
282        </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="pltz"></a>2.3.&nbsp;
283        vertical sections
284      </h3></div></div></div><p>
285          A quick presentation of vertical sections is shown in <a href="../../Tests/tst_pltz.pro?format=raw" target="_top">tst_pltz</a>. After laoding any of the grid (for example with one of the <a href="#load_grid" title="2.1.&nbsp;&#xA;Load the data grid&#xA;      ">above examples</a>). Just try:
286          </p><pre class="screen">
287  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">tst_pltz</strong></span></code></strong>
288          </pre><p>
289        </p><p><span class="emphasis"><em>Beware, the command is <span><strong class="command">tst_pltz</strong></span> and not <span><strong class="command">@tst_pltz</strong></span> as <code class="filename">tst_pltz.pro</code> is a procedure and not an include.</em></span></p><p>
290          See the results with
291          </p><div class="itemizedlist"><ul type="disc"><li><span><strong class="command">@tst_initlev</strong></span> <a href="figpng/tst_pltz_lev_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_11.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca2</strong></span> <a href="figpng/tst_pltz_orca2_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_11.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_12.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca05</strong></span> <a href="figpng/tst_pltz_orca05_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_11.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_12.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initlev_stride</strong></span> <a href="figpng/tst_pltz_lev_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_lev_stride_11.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca2_stride</strong></span> <a href="figpng/tst_pltz_orca2_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca2_stride_11.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca05_stride</strong></span> <a href="figpng/tst_pltz_orca05_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_07.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_08.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_09.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_10.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltz_orca05_stride_11.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li></ul></div><p>
292        </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="pltt"></a>2.4.&nbsp;
293        hovmoellers and time series
294      </h3></div></div></div><p>
295          A quick presentation of hovmoellers and time series is shown in <a href="../../Tests/tst_pltt.pro?format=raw" target="_top">tst_pltt</a>. After laoding any of the grid (for example with one of the <a href="#load_grid" title="2.1.&nbsp;&#xA;Load the data grid&#xA;      ">above examples</a>). Just try:
296          </p><pre class="screen">
297  <code class="prompt">idl&gt;</code> <strong class="userinput"><code><span><strong class="command">tst_pltt</strong></span></code></strong>
298          </pre><p>
299        </p><p><span class="emphasis"><em>Beware, the command is <span><strong class="command">tst_pltt</strong></span> and not <span><strong class="command">@tst_pltt</strong></span> as <code class="filename">tst_pltt.pro</code> is a procedure and not an include.</em></span></p><p>
300          See the results with
301          </p><div class="itemizedlist"><ul type="disc"><li><span><strong class="command">@tst_initlev</strong></span> <a href="figpng/tst_pltt_lev_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca2</strong></span> <a href="figpng/tst_pltt_orca2_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca05</strong></span> <a href="figpng/tst_pltt_orca05_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initlev_stride</strong></span> <a href="figpng/tst_pltt_lev_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_lev_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca2_stride</strong></span> <a href="figpng/tst_pltt_orca2_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca2_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li><li><span><strong class="command">@tst_initorca05_stride</strong></span> <a href="figpng/tst_pltt_orca05_stride_01.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_stride_02.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_stride_03.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_stride_04.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_stride_05.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a> <a href="figpng/tst_pltt_orca05_stride_06.png?format=raw" target="_top"><span class="inlinemediaobject"><img src="images/showfig.png?format=raw" alt="show result"></span></a></li></ul></div><p>
302        </p></div><div class="sect2" lang="en"><div class="titlepage"><div><div><h3 class="title"><a name="plt1d"></a>2.5.&nbsp;
303        1D plots
304      </h3></div></div></div><p>
305          To be continued...
306        </p></div></div></div></body></html>
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