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| 7 | "text/html; charset=us-ascii"> |
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| 8 | <title>Mini Guide for Basic Commands in the XXX Program</title> |
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| 9 | <link rel="stylesheet" href="style.css" type="text/css"> |
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| 10 | <link rel="stylesheet" href="saxo.css" type="text/css"> |
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| 12 | <meta name="keywords" content="idl, SAXO, xxx"> |
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| 14 | <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" |
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| 15 | alink="#0000FF"> |
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| 16 | <div class="article" lang="en"> |
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| 17 | <div class="titlepage"> |
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| 18 | <div> |
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| 19 | <div> |
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| 20 | <h2 class="title"><a name="d0e2" id="d0e2"></a> Mini Guide for |
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| 21 | Basic Commands in the XXX Program</h2> |
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| 22 | </div> |
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| 23 | <div> |
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| 24 | <div class="authorgroup"> |
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| 25 | <div class="author"> |
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| 26 | <h3 class="author"><span class="firstname">Sébastien</span> |
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| 27 | <span class="surname">Masson</span> <code class= |
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| 28 | "email"><<a href="mailto:Sebastien.Masson_at_locean-ipsl.upmc.fr">Sebastien.Masson_at_locean-ipsl.upmc.fr</a>></code></h3> |
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| 29 | </div> |
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| 30 | <div class="author"> |
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| 31 | <h3 class="author"><span class="firstname">Albert</span> |
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| 32 | <span class="surname">Fisher</span></h3> |
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| 33 | </div> |
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| 34 | <div class="author"> |
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| 35 | <h3 class="author"><span class="firstname">Françoise</span> |
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| 36 | <span class="surname">Pinsard</span> <code class= |
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| 37 | "email"><<a href= |
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| 38 | "mailto:Francoise.Pinsard_at_locean-ipsl.upmc.fr">Francoise.Pinsard_at_locean-ipsl.upmc.fr</a>></code></h3> |
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| 39 | </div> |
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| 40 | <div class="author"> |
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| 41 | <h3 class="author"><span class="firstname">Steve</span> |
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| 42 | <span class="surname">Navarro</span></h3> |
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| 43 | </div> |
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| 44 | </div> |
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| 45 | </div> |
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| 46 | <div><span class="pubdate">svn Id of xml source file : $Id: |
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| 47 | mini_notice.xml 144 2006-07-21 14:32:11Z pinsard $<br> |
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| 48 | <br></span></div> |
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| 49 | <div> |
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| 50 | <div class="revhistory"> |
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| 51 | <table border="1" width="100%" summary="Revision history"> |
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| 52 | <tr> |
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| 53 | <th align="left" valign="top" colspan="2"><b>Revision |
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| 54 | History</b></th> |
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| 55 | </tr> |
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| 56 | <tr> |
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| 57 | <td align="left">Revision 0.0</td> |
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| 58 | <td align="left">May 29, 2000</td> |
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| 59 | </tr> |
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| 60 | <tr> |
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| 61 | <td align="left" colspan="2">French release by Sébastien |
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| 62 | Masson</td> |
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| 63 | </tr> |
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| 64 | <tr> |
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| 65 | <td align="left">Revision 0.1</td> |
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| 66 | <td align="left">July, 2002</td> |
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| 67 | </tr> |
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| 68 | <tr> |
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| 69 | <td align="left" colspan="2">Translation by Albert Fisher</td> |
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| 70 | </tr> |
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| 71 | <tr> |
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| 72 | <td align="left">Revision 0.2</td> |
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| 73 | <td align="left">July 20, 2006</td> |
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| 74 | </tr> |
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| 75 | <tr> |
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| 76 | <td align="left" colspan="2">HTML to XML/Docbook migration by |
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| 77 | Françoise Pinsard</td> |
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| 78 | </tr> |
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| 79 | </table> |
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| 80 | </div> |
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| 81 | </div> |
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| 82 | </div> |
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| 83 | <hr></div> |
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| 84 | <div class="toc"> |
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| 85 | <p><b>Table of Contents</b></p> |
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| 86 | <dl> |
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| 87 | <dt><span class="sect1"><a href="#intro">1. Introduction and |
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| 88 | assumptions</a></span></dt> |
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| 89 | <dt><span class="sect1"><a href="#beforefirststeps">2. Before |
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| 90 | this</a></span></dt> |
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| 91 | <dt><span class="sect1"><a href="#initfiles">3. Install the files |
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| 92 | <code class="filename">init.pro</code> and <code class= |
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| 93 | "filename">initgrid.pro</code></a></span></dt> |
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| 94 | <dd> |
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| 95 | <dl> |
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| 96 | <dt><span class="sect2"><a href="#modifinitgrid">3.1. Modification |
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| 97 | or creation of the <code class="filename">initgrid.pro</code> |
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| 98 | script</a></span></dt> |
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| 99 | </dl> |
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| 100 | </dd> |
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| 101 | <dt><span class="sect1"><a href="#introxxx">4. Starting the |
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| 102 | <span class="application">SAXO</span> package and an explanation of |
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| 103 | the XXX widget functions</a></span></dt> |
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| 104 | <dd> |
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| 105 | <dl> |
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| 106 | <dt><span class="sect2"><a href="#launchxxx">4.1. Launching |
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| 107 | XXX</a></span></dt> |
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| 108 | <dt><span class="sect2"><a href="#wigdets">4.2. An explanation of |
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| 109 | the different widgets</a></span></dt> |
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| 110 | </dl> |
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| 111 | </dd> |
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| 112 | <dt><span class="sect1"><a href="#examples">5. Concrete examples of |
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| 113 | XXX in practice</a></span></dt> |
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| 114 | <dd> |
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| 115 | <dl> |
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| 116 | <dt><span class="sect2"><a href="#example1">5.1. First |
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| 117 | plots</a></span></dt> |
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| 118 | <dt><span class="sect2"><a href="#example2">5.2. Work with more |
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| 119 | than one file</a></span></dt> |
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| 120 | <dt><span class="sect2"><a href="#mouse">5.3. Mouse actions in the |
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| 121 | graphics window on a horizontal plot</a></span></dt> |
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| 122 | <dt><span class="sect2"><a href="#multipleplots">5.4. Create |
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| 123 | multiple plots on the same sheet and make them |
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| 124 | interact</a></span></dt> |
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| 125 | </dl> |
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| 126 | </dd> |
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| 127 | <dt><span class="sect1"><a href="#crash">6. How to quit when it |
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| 128 | crashes</a></span></dt> |
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| 129 | </dl> |
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| 130 | </div> |
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| 131 | <div class="sect1" lang="en"> |
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| 132 | <div class="titlepage"> |
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| 133 | <div> |
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| 134 | <div> |
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| 135 | <h2 class="title" style="clear: both"><a name="intro" id= |
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| 136 | "intro"></a>1. Introduction and assumptions</h2> |
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| 137 | </div> |
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| 138 | </div> |
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| 139 | </div> |
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| 140 | <p>This micro guide is unfortunately not a user's guide for all the |
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| 141 | scripts that have been written for IDL (version 5.2 or higher |
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| 142 | required). The goal is simply to clarify a few points on the use of |
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| 143 | the <code class="filename">xxx.pro</code> program.</p> |
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| 144 | <p>For further help on the furnished scripts, here are several |
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| 145 | possibilities:</p> |
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| 146 | <div class="itemizedlist"> |
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| 147 | <ul type="disc"> |
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| 148 | <li> |
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| 149 | <p>execute in IDL the command</p> |
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| 150 | <pre class="screen"> |
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| 151 | <code class="prompt">idl></code> <strong class= |
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| 152 | "userinput"><code>xhelp, '<em class= |
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| 153 | "replaceable"><code>script_name</code></em>'</code></strong> |
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| 154 | </pre></li> |
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| 155 | <li> |
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| 156 | <p>consult the IDL online help for scripts whose source is |
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| 157 | unavailable</p> |
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| 158 | </li> |
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| 159 | <li> |
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| 160 | <p>subscribe to the mailing list for updates and user |
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| 161 | questions/responses</p> |
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| 162 | <p>to subscribe, send a mail to: <a href= |
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| 163 | "mailto:majordomo@lmd.jussieu.fr" target= |
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| 164 | "_top">majordomo@lmd.jussieu.fr</a> with no subject, containing the |
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| 165 | message: <strong class="userinput"><code>subscribe forum-idl |
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| 166 | <em class="replaceable"><code>e-mail |
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| 167 | address</code></em></code></strong></p> |
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| 168 | </li> |
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| 169 | <li> |
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| 170 | <p>consult the archives of this mail list: <a href= |
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| 171 | "http://www.lmd.jussieu.fr/archives/form-idl/last/mail1.html" |
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| 172 | target= |
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| 173 | "_top">http://www.lmd.jussieu.fr/archives/form-idl/last/mail1.html</a></p> |
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| 174 | </li> |
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| 175 | <li> |
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| 176 | <p>consult in desperation the feeble web pages we have started to |
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| 177 | write (while waiting for something better) <a href= |
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| 178 | "http://www.ipsl.jussieu.fr/~smlod/" target= |
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| 179 | "_top">http://www.ipsl.jussieu.fr/~smlod/</a></p> |
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| 180 | </li> |
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| 181 | <li> |
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| 182 | <p>wait until we write a full user's manual!</p> |
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| 183 | </li> |
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| 184 | </ul> |
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| 185 | </div> |
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| 186 | <p>The XXX widget is a layer on top of the scripts in the |
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| 187 | <span class="application">SAXO</span> package (themselves layered |
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| 188 | on top of IDL). It is designed to permit the visualization and |
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| 189 | rapid exploration of data, offering a maximum in options, while not |
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| 190 | necessarily all those offered by the package and by IDL.</p> |
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| 191 | <p>Based on the use of files in the NetCDF format, it can easily |
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| 192 | work with other file formats. For this, all that is necessary is to |
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| 193 | write an IDL function capable of extracting a matrix from a file as |
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| 194 | a function of the following parameters: the variable name, two |
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| 195 | dates, an experiment name, and a domain.</p> |
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| 196 | <p>Developed to visualize the output of the OPA model, the |
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| 197 | <span class="application">SAXO</span> package was conceived to work |
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| 198 | on C grids. To use it on grids where the T, U, and V points are the |
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| 199 | same, one must nevertheless declare the parameters of the grid that |
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| 200 | correspond to the U and V points. Careful, for this type of |
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| 201 | discretization, the calculation scripts of type <code class= |
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| 202 | "filename">div.pro</code> and <code class= |
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| 203 | "filename">curl.pro</code> are wrong.</p> |
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| 204 | <p>The averaging routines are not adapted to warped grids, they sum |
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| 205 | following the i, j, and k indices, weighting each point by scale |
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| 206 | factors and the land-sea mask. Slices and Hovmoellers do not work |
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| 207 | in the diagonal, but are always done following i, j, or k. When a |
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| 208 | domain is given to one of the scripts, an average over the domain |
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| 209 | in the directions perpendicular to that displayed is automatically |
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| 210 | made before display.</p> |
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| 211 | <p>Before continuing on to the practical part of this guide, the |
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| 212 | installation and use of the <span class="application">SAXO</span> |
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| 213 | package, I'd like to thank Guillaume Roullet, who also participated |
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| 214 | in the writing of the scripts in the package (notably the drawing |
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| 215 | of vectors on warped grids).</p> |
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| 216 | </div> |
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| 217 | <div class="sect1" lang="en"> |
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| 218 | <div class="titlepage"> |
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| 219 | <div> |
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| 220 | <div> |
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| 221 | <h2 class="title" style="clear: both"><a name="beforefirststeps" |
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| 222 | id="beforefirststeps"></a>2. Before this</h2> |
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| 223 | </div> |
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| 224 | </div> |
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| 225 | </div> |
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| 226 | <p>In this document, we supposed that you followed <a href= |
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| 227 | "getsaxo.html?format=raw" target="_top">Get SAXO</a> |
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| 228 | recommandations.</p> |
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| 229 | </div> |
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| 230 | <div class="sect1" lang="en"> |
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| 231 | <div class="titlepage"> |
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| 232 | <div> |
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| 233 | <div> |
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| 234 | <h2 class="title" style="clear: both"><a name="initfiles" id= |
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| 235 | "initfiles"></a>3. Install the files <code class= |
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| 236 | "filename">init.pro</code> and <code class= |
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| 237 | "filename">initgrid.pro</code></h2> |
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| 238 | </div> |
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| 239 | </div> |
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| 240 | </div> |
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| 241 | <p>This version of the <span class="application">SAXO</span> |
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| 242 | package depends a certain number of common variables that are |
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| 243 | primarily environmental parameters (working paths, color |
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| 244 | management, Postscript formatting) and the parameters of the grid |
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| 245 | on which you are working (longitude, latitude, depth, land-sea |
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| 246 | mask, scale factors, position of the zoom in relation to the |
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| 247 | original grid).</p> |
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| 248 | <p>These two types of parameters are kept separately:</p> |
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| 249 | <div class="itemizedlist"> |
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| 250 | <ul type="disc"> |
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| 251 | <li> |
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| 252 | <p>environmental parameters are defined at the very beginning of |
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| 253 | the IDL session, and are in principle never changed. They are |
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| 254 | initialized by the <code class="filename">init.pro</code> |
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| 255 | script.</p> |
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| 256 | </li> |
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| 257 | <li> |
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| 258 | <p>Those that belong to the grid are reinitialized every time the |
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| 259 | grid is changed. They can therefore be called at any time during a |
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| 260 | session. These parameters are initialized by the <code class= |
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| 261 | "filename">initgrid.pro</code> scripts, and are specific to each |
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| 262 | particular grid.</p> |
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| 263 | <p>For example: <code class="filename">initorca.pro</code> for the |
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| 264 | ORCA 2° grid, <code class="filename">initorca05.pro</code> for |
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| 265 | the ORCA 0.5° grid, or <code class= |
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| 266 | "filename">initorcapac.pro</code> for the ORCA grid zoomed on the |
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| 267 | Pacific.</p> |
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| 268 | </li> |
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| 269 | </ul> |
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| 270 | </div> |
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| 271 | <p>To begin, one must therefore copy <code class= |
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| 272 | "filename"><em class= |
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| 273 | "replaceable"><code>packagedir</code></em>/INIT/init.pro</code> |
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| 274 | into <em class="replaceable"><code>homedir</code></em>, and create |
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| 275 | in <em class="replaceable"><code>homedir</code></em> a script of |
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| 276 | the type <code class="filename">initgrid.pro</code>.</p> |
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| 277 | <div class="sect2" lang="en"> |
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| 278 | <div class="titlepage"> |
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| 279 | <div> |
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| 280 | <div> |
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| 281 | <h3 class="title"><a name="modifinitgrid" id= |
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| 282 | "modifinitgrid"></a>3.1. Modification or creation of the |
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| 283 | <code class="filename">initgrid.pro</code> script</h3> |
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| 284 | </div> |
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| 285 | </div> |
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| 286 | </div> |
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| 287 | <p>In the <em class="replaceable"><code>packagedir</code></em>/INIT |
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| 288 | directory you will find a certain number of scripts associated with |
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| 289 | the latest grids on which I've worked. If you are also working on |
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| 290 | one of these grids, for example ORCA, copy the file <code class= |
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| 291 | "filename"><em class= |
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| 292 | "replaceable"><code>packagedir</code></em>/INIT/initorca.pro</code> |
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| 293 | to your <em class="replaceable"><code>homedir</code></em>. If not, |
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| 294 | copy it nevertheless to use as a model. In the file <code class= |
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| 295 | "filename">initgrid.pro</code>, adjust the zoom parameters (if it |
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| 296 | has not already been done).</p> |
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| 297 | <p>Careful: unlike in previous versions of the <span class= |
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| 298 | "application">SAXO</span> package, all the zoom parameters must be |
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| 299 | defined. If you do not know them in advance, define their values to |
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| 300 | be -1.</p> |
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| 301 | <p>In the rest of the script, define iodir as <em class= |
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| 302 | "replaceable"><code>iodir</code></em>, and verify the name of the |
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| 303 | mask file, if one exists.</p> |
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| 304 | </div> |
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| 305 | </div> |
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| 306 | <div class="sect1" lang="en"> |
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| 307 | <div class="titlepage"> |
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| 308 | <div> |
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| 309 | <div> |
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| 310 | <h2 class="title" style="clear: both"><a name="introxxx" id= |
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| 311 | "introxxx"></a>4. Starting the <span class= |
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| 312 | "application">SAXO</span> package and an explanation of the XXX |
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| 313 | widget functions</h2> |
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| 314 | </div> |
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| 315 | </div> |
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| 316 | </div> |
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| 317 | <div class="sect2" lang="en"> |
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| 318 | <div class="titlepage"> |
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| 319 | <div> |
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| 320 | <div> |
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| 321 | <h3 class="title"><a name="launchxxx" id= |
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| 322 | "launchxxx"></a>4.1. Launching XXX</h3> |
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| 323 | </div> |
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| 324 | </div> |
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| 325 | </div> |
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| 326 | <p>The first command to type is</p> |
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| 327 | <pre class="screen"> |
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| 328 | <code class="prompt">idl></code> <strong class= |
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| 329 | "userinput"><code>@init</code></strong> |
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| 330 | </pre> |
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| 331 | <p>Afterwards, to work directly with XXX, type:</p> |
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| 332 | <pre class="screen"> |
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| 333 | |
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| 334 | <code class="prompt">idl></code> <strong class= |
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| 335 | "userinput"><code>xxx</code></strong> |
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| 336 | </pre> |
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| 337 | <p>To work without the XXX interface, initialize a grid</p> |
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| 338 | <pre class="screen"> |
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| 339 | |
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| 340 | <code class="prompt">idl></code> <strong class= |
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| 341 | "userinput"><code>@initgrid</code></strong> |
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| 342 | </pre> |
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| 343 | <p>A window will open with 2 lines to complete.</p> |
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| 344 | <div class="figure"><a name="fig_xxx_1" id="fig_xxx_1"></a> |
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| 345 | <p class="title"><b>Figure 1. Window xxx 1</b></p> |
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| 346 | <div class="figure-contents"> |
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| 347 | <div class="mediaobjectco"><img border="0" usemap="d0e293" src= |
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| 348 | "figpng/xxx_1_complete.png" alt="Window xxx 1"><map name="d0e293" |
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| 349 | id="d0e293"> |
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| 350 | <area shape="rect" coords="5,254,515,219"> |
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| 351 | <area shape="rect" coords="5,159,515,109"></map> |
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| 352 | <div class="calloutlist"> |
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| 353 | <table border="0" summary="Callout list"> |
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| 354 | <tr> |
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| 355 | <td width="5%" valign="top" align="left"><img src= |
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| 356 | "images/callouts/1.png" alt="1" border="0"></td> |
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| 357 | <td valign="top" align="left"> |
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| 358 | <p>datafile</p> |
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| 359 | </td> |
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| 360 | </tr> |
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| 361 | <tr> |
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| 362 | <td width="5%" valign="top" align="left"><img src= |
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| 363 | "images/callouts/2.png" alt="2" border="0"></td> |
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| 364 | <td valign="top" align="left"> |
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| 365 | <p>initfile</p> |
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| 366 | </td> |
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| 367 | </tr> |
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| 368 | </table> |
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| 369 | </div> |
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| 370 | </div> |
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| 371 | </div> |
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| 372 | </div> |
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| 373 | <p><br class="figure-break"></p> |
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| 374 | <p>These lines must contain the address of a file. The name can be |
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| 375 | typed directly in the window provided, or selected with the help of |
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| 376 | the <span class="guibutton">browse</span> button. The first line |
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| 377 | must contain the name of the data file, the second the name of the |
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| 378 | <code class="filename">initgrid.pro</code> script which will permit |
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| 379 | the reading and processing of the grid associated with the data |
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| 380 | file.</p> |
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| 381 | <p>Once these two lines have been completed, click on <span class= |
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| 382 | "guibutton">let's go</span>. Two other windows will then open, |
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| 383 | giving you the parameters for reading the grid and the file (these |
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| 384 | parameters are read in the <code class= |
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| 385 | "filename">initgrid.pro</code> script). Click twice on <span class= |
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| 386 | "guibutton">OK</span>.</p> |
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| 387 | </div> |
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| 388 | <div class="sect2" lang="en"> |
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| 389 | <div class="titlepage"> |
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| 390 | <div> |
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| 391 | <div> |
|---|
| 392 | <h3 class="title"><a name="wigdets" id="wigdets"></a>4.2. An |
|---|
| 393 | explanation of the different widgets</h3> |
|---|
| 394 | </div> |
|---|
| 395 | </div> |
|---|
| 396 | </div> |
|---|
| 397 | <p>Now the XXX window will open.</p> |
|---|
| 398 | <div class="figure"><a name="fig_xxx_2" id="fig_xxx_2"></a> |
|---|
| 399 | <p class="title"><b>Figure 2. Window xxx 2</b></p> |
|---|
| 400 | <div class="figure-contents"> |
|---|
| 401 | <div class="mediaobjectco"><img border="0" usemap="d0e340" src= |
|---|
| 402 | "figpng/xxx_2_complete.png" alt="Window xxx 2"><map name="d0e340" |
|---|
| 403 | id="d0e340"> |
|---|
| 404 | <area shape="rect" coords="70,575,200,550"> |
|---|
| 405 | <area shape="rect" coords="10,490,230,450"> |
|---|
| 406 | <area shape="rect" coords="10,430,300,230"> |
|---|
| 407 | <area shape="rect" coords="10,180,350,130"></map> |
|---|
| 408 | <div class="calloutlist"> |
|---|
| 409 | <table border="0" summary="Callout list"> |
|---|
| 410 | <tr> |
|---|
| 411 | <td width="5%" valign="top" align="left"><img src= |
|---|
| 412 | "images/callouts/1.png" alt="1" border="0"></td> |
|---|
| 413 | <td valign="top" align="left"> |
|---|
| 414 | <p>Page layout</p> |
|---|
| 415 | </td> |
|---|
| 416 | </tr> |
|---|
| 417 | <tr> |
|---|
| 418 | <td width="5%" valign="top" align="left"><img src= |
|---|
| 419 | "images/callouts/2.png" alt="2" border="0"></td> |
|---|
| 420 | <td valign="top" align="left"> |
|---|
| 421 | <p>Calendar</p> |
|---|
| 422 | </td> |
|---|
| 423 | </tr> |
|---|
| 424 | <tr> |
|---|
| 425 | <td width="5%" valign="top" align="left"><img src= |
|---|
| 426 | "images/callouts/3.png" alt="3" border="0"></td> |
|---|
| 427 | <td valign="top" align="left"> |
|---|
| 428 | <p>Domain</p> |
|---|
| 429 | </td> |
|---|
| 430 | </tr> |
|---|
| 431 | <tr> |
|---|
| 432 | <td width="5%" valign="top" align="left"><img src= |
|---|
| 433 | "images/callouts/4.png" alt="4" border="0"></td> |
|---|
| 434 | <td valign="top" align="left"> |
|---|
| 435 | <p>Specify</p> |
|---|
| 436 | </td> |
|---|
| 437 | </tr> |
|---|
| 438 | </table> |
|---|
| 439 | </div> |
|---|
| 440 | </div> |
|---|
| 441 | </div> |
|---|
| 442 | </div> |
|---|
| 443 | <p><br class="figure-break"></p> |
|---|
| 444 | <p>It's configuration will change depending on whether you are in |
|---|
| 445 | portrait or in landscape, but here are the different parts |
|---|
| 446 | available for your use.</p> |
|---|
| 447 | <div class="sect3" lang="en"> |
|---|
| 448 | <div class="titlepage"> |
|---|
| 449 | <div> |
|---|
| 450 | <div> |
|---|
| 451 | <h4 class="title"><a name="menubar" id= |
|---|
| 452 | "menubar"></a>4.2.1. The menu bar made up of 3 submenus</h4> |
|---|
| 453 | </div> |
|---|
| 454 | </div> |
|---|
| 455 | </div> |
|---|
| 456 | <div class="sect4" lang="en"> |
|---|
| 457 | <div class="titlepage"> |
|---|
| 458 | <div> |
|---|
| 459 | <div> |
|---|
| 460 | <h5 class="title"><a name="filesubmenu" id= |
|---|
| 461 | "filesubmenu"></a>4.2.1.1. <span class= |
|---|
| 462 | "guisubmenu">File</span> submenu</h5> |
|---|
| 463 | </div> |
|---|
| 464 | </div> |
|---|
| 465 | </div> |
|---|
| 466 | <div class="itemizedlist"> |
|---|
| 467 | <ul type="disc"> |
|---|
| 468 | <li> |
|---|
| 469 | <p><span class="guimenuitem">Open:</span> to open a second file. |
|---|
| 470 | Same procedure as during the launching of XXX. The new file can be |
|---|
| 471 | on a different grid, with different variables, with a different |
|---|
| 472 | time base.</p> |
|---|
| 473 | </li> |
|---|
| 474 | <li> |
|---|
| 475 | <p><span class="guimenuitem">New XXX:</span> to open a second XXX |
|---|
| 476 | window identical to the first.</p> |
|---|
| 477 | </li> |
|---|
| 478 | <li> |
|---|
| 479 | <p><span class="guimenuitem">Close:</span> to close the XXX |
|---|
| 480 | window.</p> |
|---|
| 481 | </li> |
|---|
| 482 | </ul> |
|---|
| 483 | </div> |
|---|
| 484 | </div> |
|---|
| 485 | <div class="sect4" lang="en"> |
|---|
| 486 | <div class="titlepage"> |
|---|
| 487 | <div> |
|---|
| 488 | <div> |
|---|
| 489 | <h5 class="title"><a name="saveassubmenu" id= |
|---|
| 490 | "saveassubmenu"></a>4.2.1.2. <span class="guisubmenu">Save |
|---|
| 491 | As</span> submenu</h5> |
|---|
| 492 | </div> |
|---|
| 493 | </div> |
|---|
| 494 | </div> |
|---|
| 495 | <div class="itemizedlist"> |
|---|
| 496 | <ul type="disc"> |
|---|
| 497 | <li> |
|---|
| 498 | <p><span class="guimenuitem">Postscript:</span> to save in |
|---|
| 499 | Postscript format</p> |
|---|
| 500 | </li> |
|---|
| 501 | <li> |
|---|
| 502 | <p><span class="guimenuitem">Animations:</span> to create an |
|---|
| 503 | animation from the XXX window. Careful, the creation of an |
|---|
| 504 | animation is only possible if none of the plots have a time axis, |
|---|
| 505 | and if the plots are all on the same time base (calendar). On the |
|---|
| 506 | other hand, animations of horizontal and vertical plots, with |
|---|
| 507 | different color palettes (for those not on an X-terminal), are |
|---|
| 508 | possible.</p> |
|---|
| 509 | </li> |
|---|
| 510 | <li> |
|---|
| 511 | <p><span class="guimenuitem">Image:</span> to save a gif of the XXX |
|---|
| 512 | graphics window.</p> |
|---|
| 513 | </li> |
|---|
| 514 | <li> |
|---|
| 515 | <p><span class="guimenuitem">Script:</span> to save the command |
|---|
| 516 | history that has created the plot. For example if I save the |
|---|
| 517 | commands in <code class="filename">xxx_figure.pro</code>, I can |
|---|
| 518 | then launch a new IDL session and type:</p> |
|---|
| 519 | <pre class="screen"> |
|---|
| 520 | <code class="prompt">idl></code> <strong class= |
|---|
| 521 | "userinput"><code>@init</code></strong> |
|---|
| 522 | <code class="prompt">idl></code> <strong class= |
|---|
| 523 | "userinput"><code>xxx_figure</code></strong> |
|---|
| 524 | </pre> |
|---|
| 525 | <p>and I'll obtain the saved figure.</p> |
|---|
| 526 | <pre class="screen"> |
|---|
| 527 | <code class="prompt">idl></code> <strong class= |
|---|
| 528 | "userinput"><code>xxx_figure,/post </code></strong> |
|---|
| 529 | </pre> |
|---|
| 530 | <p>or</p> |
|---|
| 531 | <pre class="screen"> |
|---|
| 532 | <code class="prompt">idl></code> <strong class= |
|---|
| 533 | "userinput"><code>@ps</code></strong> |
|---|
| 534 | </pre> |
|---|
| 535 | <p>will then create a Postscript file of the figure.</p> |
|---|
| 536 | </li> |
|---|
| 537 | <li> |
|---|
| 538 | <p><span class="guimenuitem">Prompt:</span> lists in the IDL window |
|---|
| 539 | the command history that created the last plot. Useful primarily |
|---|
| 540 | for debugging...</p> |
|---|
| 541 | </li> |
|---|
| 542 | </ul> |
|---|
| 543 | </div> |
|---|
| 544 | </div> |
|---|
| 545 | <div class="sect4" lang="en"> |
|---|
| 546 | <div class="titlepage"> |
|---|
| 547 | <div> |
|---|
| 548 | <div> |
|---|
| 549 | <h5 class="title"><a name="flagsubmenu" id= |
|---|
| 550 | "flagsubmenu"></a>4.2.1.3. <span class="guisubmenu">Flag |
|---|
| 551 | options</span> submenu</h5> |
|---|
| 552 | </div> |
|---|
| 553 | </div> |
|---|
| 554 | </div> |
|---|
| 555 | <div class="itemizedlist"> |
|---|
| 556 | <ul type="disc"> |
|---|
| 557 | <li> |
|---|
| 558 | <p><span class="guibutton">OK</span> To show/hide the OK button in |
|---|
| 559 | the upper left corner.</p> |
|---|
| 560 | </li> |
|---|
| 561 | <li> |
|---|
| 562 | <p><span class="guibutton">Portrait/Landscape:</span> changes the |
|---|
| 563 | configuration of the plot.</p> |
|---|
| 564 | </li> |
|---|
| 565 | <li> |
|---|
| 566 | <p><span class="guibutton">Overlay:</span> to plot contours of a |
|---|
| 567 | different field on top the one represented as color-filled |
|---|
| 568 | contours. It is necessary to relaunch the entire plot to make this |
|---|
| 569 | work!</p> |
|---|
| 570 | </li> |
|---|
| 571 | <li> |
|---|
| 572 | <p><span class="guibutton">Vecteur:</span> to plot a vector field |
|---|
| 573 | on top of contours. Only works on horizontal plots (<code class= |
|---|
| 574 | "filename">plt.pro</code>). As for Overlay, a relaunch of the |
|---|
| 575 | entire plot is necessary.</p> |
|---|
| 576 | </li> |
|---|
| 577 | <li> |
|---|
| 578 | <p><span class="guibutton">Longitude / x index:</span> switches |
|---|
| 579 | longitude labelling of the plot subdomain from degrees to indices |
|---|
| 580 | following i.</p> |
|---|
| 581 | </li> |
|---|
| 582 | <li> |
|---|
| 583 | <p><span class="guibutton">Latitude / y index:</span> switches |
|---|
| 584 | latitude labelling of the plot subdomain from degrees to indices |
|---|
| 585 | following j.</p> |
|---|
| 586 | </li> |
|---|
| 587 | </ul> |
|---|
| 588 | </div> |
|---|
| 589 | </div> |
|---|
| 590 | </div> |
|---|
| 591 | <div class="sect3" lang="en"> |
|---|
| 592 | <div class="titlepage"> |
|---|
| 593 | <div> |
|---|
| 594 | <div> |
|---|
| 595 | <h4 class="title"><a name="typeplot" id= |
|---|
| 596 | "typeplot"></a>4.2.2. What type of plot and where?</h4> |
|---|
| 597 | </div> |
|---|
| 598 | </div> |
|---|
| 599 | </div> |
|---|
| 600 | <div class="itemizedlist"> |
|---|
| 601 | <ul type="disc"> |
|---|
| 602 | <li> |
|---|
| 603 | <p><span class="guibutton">OK</span> Show/hide the OK button in the |
|---|
| 604 | upper left. When present, a click is required to make a new plot |
|---|
| 605 | appear. Otherwise each action creates a new plot.</p> |
|---|
| 606 | </li> |
|---|
| 607 | <li> |
|---|
| 608 | <p><span class="guimenuitem">Plot type list:</span> allows |
|---|
| 609 | specification of the type of plot desired.</p> |
|---|
| 610 | <div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"> |
|---|
| 611 | <h3 class="title">Note</h3> |
|---|
| 612 | <p>If the type <code class="constant">plt</code> is selected, the |
|---|
| 613 | selection of plot type is made by mouse. Cf <a href="#mouse" title= |
|---|
| 614 | "5.3. Mouse actions in the graphics window on a horizontal plot"> |
|---|
| 615 | Section 5.3, “Mouse actions in the graphics window on a |
|---|
| 616 | horizontal plot”</a></p> |
|---|
| 617 | </div> |
|---|
| 618 | </li> |
|---|
| 619 | <li> |
|---|
| 620 | <p><span class="guimenuitem">Layout configuration:</span> specify |
|---|
| 621 | the number of columns and rows for plots on the sheet of paper. |
|---|
| 622 | There's no code behind the undo command! The <span class= |
|---|
| 623 | "guibutton">clear</span> button erases all plots.</p> |
|---|
| 624 | </li> |
|---|
| 625 | <li> |
|---|
| 626 | <p><span class="guimenuitem">List of open files:</span> you can |
|---|
| 627 | choose the file to work on.</p> |
|---|
| 628 | </li> |
|---|
| 629 | <li> |
|---|
| 630 | <p><span class="guimenuitem">Command window:</span> this window |
|---|
| 631 | permits simple operations on the fields:</p> |
|---|
| 632 | <p>for example:</p> |
|---|
| 633 | <div class="literallayout"> |
|---|
| 634 | <p>toto - 10*field + 36</p> |
|---|
| 635 | </div> |
|---|
| 636 | <div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"> |
|---|
| 637 | <h3 class="title">Note</h3> |
|---|
| 638 | <p>In the default case, the name given to a field is of no |
|---|
| 639 | importance.</p> |
|---|
| 640 | </div> |
|---|
| 641 | </li> |
|---|
| 642 | </ul> |
|---|
| 643 | </div> |
|---|
| 644 | </div> |
|---|
| 645 | <div class="sect3" lang="en"> |
|---|
| 646 | <div class="titlepage"> |
|---|
| 647 | <div> |
|---|
| 648 | <div> |
|---|
| 649 | <h4 class="title"><a name="sect_calendar" id= |
|---|
| 650 | "sect_calendar"></a>4.2.3. Calendar</h4> |
|---|
| 651 | </div> |
|---|
| 652 | </div> |
|---|
| 653 | </div> |
|---|
| 654 | <p>The calendar is made up of two droplists, which allow |
|---|
| 655 | specification of two dates, the beginning and end of a time series, |
|---|
| 656 | or the period over which to average before plotting.</p> |
|---|
| 657 | </div> |
|---|
| 658 | <div class="sect3" lang="en"> |
|---|
| 659 | <div class="titlepage"> |
|---|
| 660 | <div> |
|---|
| 661 | <div> |
|---|
| 662 | <h4 class="title"><a name="sect_domain" id= |
|---|
| 663 | "sect_domain"></a>4.2.4. Domain specification</h4> |
|---|
| 664 | </div> |
|---|
| 665 | </div> |
|---|
| 666 | </div> |
|---|
| 667 | <p>A series of widgets that allow specification of the min/max |
|---|
| 668 | limits of the domain in longitude/x-index, latitude/y-index, and |
|---|
| 669 | depth in levels or meters. For depth, one can specify in levels for |
|---|
| 670 | a horizontal plot, and in meters for a vertical plot.</p> |
|---|
| 671 | </div> |
|---|
| 672 | <div class="sect3" lang="en"> |
|---|
| 673 | <div class="titlepage"> |
|---|
| 674 | <div> |
|---|
| 675 | <div> |
|---|
| 676 | <h4 class="title"><a name="details" id= |
|---|
| 677 | "details"></a>4.2.5. Plot details</h4> |
|---|
| 678 | </div> |
|---|
| 679 | </div> |
|---|
| 680 | </div> |
|---|
| 681 | <p>You can specify the min, max, and contour interval by filling |
|---|
| 682 | out the provided boxes! For the color palette, you can either |
|---|
| 683 | specify the name or go search for one among the palettes |
|---|
| 684 | available.</p> |
|---|
| 685 | <p>The "keywords" window allows specification of all desired |
|---|
| 686 | keywords. These keywords can be those of <code class= |
|---|
| 687 | "filename">plt.pro</code>, <code class="filename">pltt.pro</code>, |
|---|
| 688 | <code class="filename">pltz.pro</code>, <code class= |
|---|
| 689 | "filename">plt1d.pro</code>, or those of contour, plot, or all |
|---|
| 690 | other programs that are used. Cf <a href="#example1" title= |
|---|
| 691 | "5.1. First plots">Section 5.1, “First |
|---|
| 692 | plots”</a></p> |
|---|
| 693 | </div> |
|---|
| 694 | </div> |
|---|
| 695 | </div> |
|---|
| 696 | <div class="sect1" lang="en"> |
|---|
| 697 | <div class="titlepage"> |
|---|
| 698 | <div> |
|---|
| 699 | <div> |
|---|
| 700 | <h2 class="title" style="clear: both"><a name="examples" id= |
|---|
| 701 | "examples"></a>5. Concrete examples of XXX in practice</h2> |
|---|
| 702 | </div> |
|---|
| 703 | </div> |
|---|
| 704 | </div> |
|---|
| 705 | <div class="sect2" lang="en"> |
|---|
| 706 | <div class="titlepage"> |
|---|
| 707 | <div> |
|---|
| 708 | <div> |
|---|
| 709 | <h3 class="title"><a name="example1" id= |
|---|
| 710 | "example1"></a>5.1. First plots</h3> |
|---|
| 711 | </div> |
|---|
| 712 | </div> |
|---|
| 713 | </div> |
|---|
| 714 | <p>One single file, one single plot per page</p> |
|---|
| 715 | <p>Click on OK.</p> |
|---|
| 716 | <p>Test the various basic functions: change the dates, the zoom, |
|---|
| 717 | the field...</p> |
|---|
| 718 | <p>Specify the min, max, and contour interval in the provided |
|---|
| 719 | boxes.</p> |
|---|
| 720 | <p>Add some keywords in the "keywords:" box, for example:</p> |
|---|
| 721 | <div class="blockquote"> |
|---|
| 722 | <blockquote class="blockquote"> |
|---|
| 723 | <p>/nocontour, /carte</p> |
|---|
| 724 | </blockquote> |
|---|
| 725 | </div> |
|---|
| 726 | <p>or the keywords for a northern hortographic polar |
|---|
| 727 | projection:</p> |
|---|
| 728 | <div class="blockquote"> |
|---|
| 729 | <blockquote class="blockquote"> |
|---|
| 730 | <p>/nocontour, map=[90,0,0], /horto</p> |
|---|
| 731 | </blockquote> |
|---|
| 732 | </div> |
|---|
| 733 | <p>Test the various possibilities in the <span class="guimenu">Save |
|---|
| 734 | As</span> menu.</p> |
|---|
| 735 | <div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"> |
|---|
| 736 | <h3 class="title">Note</h3> |
|---|
| 737 | <p>the creation of animations has a tendency to saturate the video |
|---|
| 738 | memory of X-terminals, crashing the entire program...</p> |
|---|
| 739 | </div> |
|---|
| 740 | <p>Test the various possibilities in the <span class="guimenu">Flag |
|---|
| 741 | options</span> menu.</p> |
|---|
| 742 | <div class="caution" style= |
|---|
| 743 | "margin-left: 0.5in; margin-right: 0.5in;"> |
|---|
| 744 | <h3 class="title">Caution</h3> |
|---|
| 745 | <p>Careful, a selected option remains selected until it is |
|---|
| 746 | reclicked.</p> |
|---|
| 747 | </div> |
|---|
| 748 | </div> |
|---|
| 749 | <div class="sect2" lang="en"> |
|---|
| 750 | <div class="titlepage"> |
|---|
| 751 | <div> |
|---|
| 752 | <div> |
|---|
| 753 | <h3 class="title"><a name="example2" id= |
|---|
| 754 | "example2"></a>5.2. Work with more than one file</h3> |
|---|
| 755 | </div> |
|---|
| 756 | </div> |
|---|
| 757 | </div> |
|---|
| 758 | <p>Open some other files and go between them by selecting them from |
|---|
| 759 | the file list... Note that the different widgets (calendar, domain, |
|---|
| 760 | ...) follow the different file characteristics.</p> |
|---|
| 761 | </div> |
|---|
| 762 | <div class="sect2" lang="en"> |
|---|
| 763 | <div class="titlepage"> |
|---|
| 764 | <div> |
|---|
| 765 | <div> |
|---|
| 766 | <h3 class="title"><a name="mouse" id="mouse"></a>5.3. Mouse |
|---|
| 767 | actions in the graphics window on a horizontal plot</h3> |
|---|
| 768 | </div> |
|---|
| 769 | </div> |
|---|
| 770 | </div> |
|---|
| 771 | <p>Select a domain and select the horizontal plot (<code class= |
|---|
| 772 | "constant">plt</code>), vertical plot (<code class= |
|---|
| 773 | "constant">pltz</code>), or the hovmoeller plot (<code class= |
|---|
| 774 | "constant">pltt</code>):</p> |
|---|
| 775 | <p>The domain we'd like to select for the plot is determined by one |
|---|
| 776 | of its diagonals, defined therefore by two points. The first point |
|---|
| 777 | is defined when the mouse button is pushed, then the mouse is |
|---|
| 778 | moved, and the second point is defined as the mouse button is |
|---|
| 779 | released (click-drag). The domains are thus defined by a long click |
|---|
| 780 | (<abbr class="abbrev">LC</abbr>). To determine which type of plot |
|---|
| 781 | should be made of selection, use:</p> |
|---|
| 782 | <div class="variablelist"> |
|---|
| 783 | <dl> |
|---|
| 784 | <dt><span class="term">If the plot selector is on <code class= |
|---|
| 785 | "constant">plt</code></span></dt> |
|---|
| 786 | <dd> |
|---|
| 787 | <p>the left mouse button to create horizontal plots (<code class= |
|---|
| 788 | "constant">plt</code>)</p> |
|---|
| 789 | <p>the middle mouse button to create vertical plots (<code class= |
|---|
| 790 | "constant">pltz</code>)</p> |
|---|
| 791 | <p>the right mouse button to create common hovmoellers for xt and |
|---|
| 792 | yt cuts (<code class="constant">pltt</code>)</p> |
|---|
| 793 | <p>In summary: <abbr class="abbrev">LCL</abbr>---><code class= |
|---|
| 794 | "constant">plt</code></p> |
|---|
| 795 | <p>LCM---><code class="constant">pltz</code></p> |
|---|
| 796 | <p>LCR---><code class="constant">pltt</code></p> |
|---|
| 797 | </dd> |
|---|
| 798 | <dt><span class="term">If the plot selector is on something other |
|---|
| 799 | than <code class="constant">plt</code></span></dt> |
|---|
| 800 | <dd> |
|---|
| 801 | <p>the indicated plot type is made.</p> |
|---|
| 802 | </dd> |
|---|
| 803 | </dl> |
|---|
| 804 | </div> |
|---|
| 805 | </div> |
|---|
| 806 | <div class="sect2" lang="en"> |
|---|
| 807 | <div class="titlepage"> |
|---|
| 808 | <div> |
|---|
| 809 | <div> |
|---|
| 810 | <h3 class="title"><a name="multipleplots" id= |
|---|
| 811 | "multipleplots"></a>5.4. Create multiple plots on the same |
|---|
| 812 | sheet and make them interact</h3> |
|---|
| 813 | </div> |
|---|
| 814 | </div> |
|---|
| 815 | </div> |
|---|
| 816 | <p>Select the number of columns and rows for the page.</p> |
|---|
| 817 | <p>Create a first plot. It will appear in the first frame.</p> |
|---|
| 818 | <p>To create a plot in another frame double-click in the frame with |
|---|
| 819 | the middle button (<abbr class="abbrev">DCM</abbr>). A black dotted |
|---|
| 820 | frame will surround the designated frame, the “<span class= |
|---|
| 821 | "quote">target</span>” frame. A black frame will surround the |
|---|
| 822 | first plot. This is the “<span class= |
|---|
| 823 | "quote">reference</span>” frame, in other words the one that |
|---|
| 824 | all the XXX widgets refer to. Change for example the date and |
|---|
| 825 | create a new plot. With a left button double-click in the first |
|---|
| 826 | frame, all the widgets change and refer again to the first plot. A |
|---|
| 827 | double-click with the right button in the second frame will erase |
|---|
| 828 | the plot.</p> |
|---|
| 829 | <p>In summary: <abbr class= |
|---|
| 830 | "abbrev">DCL</abbr>--->“<span class= |
|---|
| 831 | "quote">reference</span>” frame</p> |
|---|
| 832 | <p><abbr class="abbrev">DCM</abbr>--->“<span class= |
|---|
| 833 | "quote">target</span>” frame</p> |
|---|
| 834 | <p><abbr class="abbrev">DCR</abbr>--->erase the frame</p> |
|---|
| 835 | <p>Here's a series of commands to show how this works.</p> |
|---|
| 836 | <div class="procedure"> |
|---|
| 837 | <ol type="1"> |
|---|
| 838 | <li> |
|---|
| 839 | <p>Select a 3-D field and create 6 frames for the sheet of |
|---|
| 840 | paper.</p> |
|---|
| 841 | </li> |
|---|
| 842 | <li> |
|---|
| 843 | <p>Create a horizontal plot in Frame 1</p> |
|---|
| 844 | </li> |
|---|
| 845 | <li> |
|---|
| 846 | <p><abbr class="abbrev">DCM</abbr> in frame 2, <abbr class= |
|---|
| 847 | "abbrev">LCL</abbr> on the plot in frame 1, to create a horizontal |
|---|
| 848 | zoom in frame 2.</p> |
|---|
| 849 | <p><abbr class="abbrev">DCM</abbr> in frame 3, <abbr class= |
|---|
| 850 | "abbrev">LCM</abbr> on the plot in frame 1, to create a vertical |
|---|
| 851 | cut in frame 3.</p> |
|---|
| 852 | <p><abbr class="abbrev">DCM</abbr> in frame 4, <abbr class= |
|---|
| 853 | "abbrev">LCR</abbr> on the plot in frame 1, to create a hovmoeller |
|---|
| 854 | in frame 4.</p> |
|---|
| 855 | </li> |
|---|
| 856 | </ol> |
|---|
| 857 | </div> |
|---|
| 858 | <div class="procedure"> |
|---|
| 859 | <p>To redo the hovmoeller with the keyword</p> |
|---|
| 860 | <div class="literallayout"> |
|---|
| 861 | <p>/nocontour</p> |
|---|
| 862 | </div> |
|---|
| 863 | <ol type="1"> |
|---|
| 864 | <li> |
|---|
| 865 | <p><abbr class="abbrev">DCL</abbr> in frame 4 which now becomes the |
|---|
| 866 | reference and target frame.</p> |
|---|
| 867 | </li> |
|---|
| 868 | <li> |
|---|
| 869 | <p>Add the keyword</p> |
|---|
| 870 | <div class="literallayout"> |
|---|
| 871 | <p>/nocontour</p> |
|---|
| 872 | </div> |
|---|
| 873 | </li> |
|---|
| 874 | <li> |
|---|
| 875 | <p>click <span class="guibutton">OK</span>, and the plot is |
|---|
| 876 | redone.</p> |
|---|
| 877 | </li> |
|---|
| 878 | </ol> |
|---|
| 879 | </div> |
|---|
| 880 | <div class="procedure"> |
|---|
| 881 | <p>in frame 5, let's create the same plot as in frame 2 except with |
|---|
| 882 | different dates</p> |
|---|
| 883 | <ol type="1"> |
|---|
| 884 | <li> |
|---|
| 885 | <p><abbr class="abbrev">DCL</abbr> on frame 2</p> |
|---|
| 886 | </li> |
|---|
| 887 | <li> |
|---|
| 888 | <p><abbr class="abbrev">DCM</abbr> on frame 5</p> |
|---|
| 889 | </li> |
|---|
| 890 | <li> |
|---|
| 891 | <p>change the date</p> |
|---|
| 892 | </li> |
|---|
| 893 | <li> |
|---|
| 894 | <p>click on <span class="guibutton">OK</span> , and voilà, |
|---|
| 895 | the new plot.</p> |
|---|
| 896 | </li> |
|---|
| 897 | </ol> |
|---|
| 898 | </div> |
|---|
| 899 | </div> |
|---|
| 900 | </div> |
|---|
| 901 | <div class="sect1" lang="en"> |
|---|
| 902 | <div class="titlepage"> |
|---|
| 903 | <div> |
|---|
| 904 | <div> |
|---|
| 905 | <h2 class="title" style="clear: both"><a name="crash" id= |
|---|
| 906 | "crash"></a>6. How to quit when it crashes</h2> |
|---|
| 907 | </div> |
|---|
| 908 | </div> |
|---|
| 909 | </div> |
|---|
| 910 | <div class="orderedlist"> |
|---|
| 911 | <ol type="1"> |
|---|
| 912 | <li> |
|---|
| 913 | <p>in the IDL window, type</p> |
|---|
| 914 | <pre class="screen"> |
|---|
| 915 | <code class="prompt">idl></code> <strong class= |
|---|
| 916 | "userinput"><code>retall</code></strong> |
|---|
| 917 | </pre></li> |
|---|
| 918 | <li> |
|---|
| 919 | <p><abbr class="abbrev">DCR</abbr> to erase the problem frame</p> |
|---|
| 920 | </li> |
|---|
| 921 | <li> |
|---|
| 922 | <p>press the <span class="guibutton">clear</span> button</p> |
|---|
| 923 | </li> |
|---|
| 924 | <li> |
|---|
| 925 | <p>change the orientation of the plot</p> |
|---|
| 926 | </li> |
|---|
| 927 | <li> |
|---|
| 928 | <p>quit XXX cleanly using <span class="guibutton">quit</span> from |
|---|
| 929 | the <span class="guimenu">File</span> menu</p> |
|---|
| 930 | </li> |
|---|
| 931 | </ol> |
|---|
| 932 | </div> |
|---|
| 933 | <div class="note" style="margin-left: 0.5in; margin-right: 0.5in;"> |
|---|
| 934 | <h3 class="title">Note</h3> |
|---|
| 935 | <p>Always avoid if at all possible closing and killing the XXX |
|---|
| 936 | window, but rather select <span class="guibutton">quit</span> from |
|---|
| 937 | the <span class="guimenu">File</span> menu. XXX uses a large number |
|---|
| 938 | of pointers, and wantonly killing the window will leave a large |
|---|
| 939 | number of unused variables in memory, which could in the end |
|---|
| 940 | overflow. To clean up this memory:</p> |
|---|
| 941 | <pre class="screen"> |
|---|
| 942 | <code class="prompt">idl></code> <strong class= |
|---|
| 943 | "userinput"><code>ptr_free, ptr_valid()</code></strong> |
|---|
| 944 | </pre></div> |
|---|
| 945 | </div> |
|---|
| 946 | </div> |
|---|
| 947 | </body> |
|---|
| 948 | </html> |
|---|
