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| 5 | <title>linearequation.pro (SAXO Documentation Assistant)</title> |
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| 47 | <td width="10%"> |
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| 48 | <a href="isafile.html"><img src="./../prev.gif" border="0" alt="Previous"></a></td> |
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| 49 | <td width="80%" align="center" valign="center"> |
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| 50 | <font size=-1><i>SAXO Documentation Assistant</i>: <a href="./../home.html">Overview</a></font></td> |
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| 51 | <td width="10%" align="right"> |
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| 52 | <a href="lineintersection.html"><img src="./../next.gif" border="0" alt="Next"></a></td> |
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| 53 | </tr> |
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| 54 | </table> |
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| 55 | |
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| 56 | |
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| 57 | <h1><font size="-2">Utilities/</font></h1> |
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| 58 | <h2>linearequation.pro</h2> |
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| 59 | |
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| 60 | <dl> |
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| 61 | </dl> |
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| 62 | |
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| 63 | |
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| 64 | Calculate a linear equation of the type ax+by+c=0 |
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| 65 | thanks to coordinates of 2 points. |
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| 66 | comment: we can have a table with pairs of points. |
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| 67 | |
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| 68 | |
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| 70 | |
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| 71 | |
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| 72 | <a name="#_linearequation"></a> |
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| 73 | |
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| 74 | <h2>linearequation <font size="-1" color="#006633"> |
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| 75 | Utilities |
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| 76 | </font></h2> |
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| 77 | |
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| 78 | <p><font face="Courier"><i>result = </i>linearequation(<i><a href="#_linearequation_keyword_point1">point1</a>, <a href="#_linearequation_keyword_point2">point2</a></i>)</font></p> |
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| 79 | |
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| 82 | |
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| 83 | <h3>Return value</h3> |
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| 84 | abc is a table of dimension 3, number_of_straight_line, |
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| 85 | where for each line of the table we obtain the 3 parameters |
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| 86 | a, b and c of the linear equation ax+by+c=0 |
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| 87 | |
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| 88 | |
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| 89 | |
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| 90 | <h3>Parameters</h3> |
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| 91 | |
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| 92 | |
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| 93 | <a name="#_linearequation_keyword_point1"></a> |
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| 94 | <h4>point1 |
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| 95 | <font size="-1" color="#006633">in</font> |
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| 96 | |
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| 97 | |
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| 98 | <font size="-1" color="#006633">required</font> |
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| 99 | |
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| 100 | |
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| 101 | |
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| 102 | |
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| 103 | </h4> |
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| 104 | |
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| 105 | |
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| 106 | This is the first point of (the) straight line(s) whose we want to calculate |
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| 107 | equation(s) |
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| 108 | |
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| 109 | |
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| 110 | |
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| 111 | <a name="#_linearequation_keyword_point2"></a> |
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| 112 | <h4>point2 |
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| 113 | <font size="-1" color="#006633">in</font> |
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| 114 | |
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| 115 | |
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| 116 | <font size="-1" color="#006633">required</font> |
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| 117 | |
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| 118 | |
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| 119 | |
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| 120 | |
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| 121 | </h4> |
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| 122 | |
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| 123 | |
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| 124 | This is the second point of (the) straight line(s) whose we want to calculate |
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| 125 | equation(s) |
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| 126 | |
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| 127 | There is 2 possibilities: |
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| 128 | 1) point is a complex or a table of complex, where each element is the coordinates of the point. |
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| 129 | 2) point is a table of real of dimension 2,number_of_straight_line. |
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| 130 | For each row of the table, we have coordinates of the point. |
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| 131 | |
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| 132 | |
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| 133 | |
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| 134 | |
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| 135 | |
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| 136 | |
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| 137 | <h3>Examples</h3><pre> |
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| 138 | IDL> abc=linearequation(complex(1,2),[3,4]) |
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| 139 | IDL> print, abc[0]*1+abc[1]*2+abc[2] |
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| 140 | 0.00000 |
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| 141 | |
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| 142 | </pre><h3>Version history</h3> |
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| 143 | |
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| 144 | <h4>Version</h4> |
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| 145 | $Id: linearequation.pro 325 2007-12-06 10:04:53Z pinsard $ |
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| 146 | |
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| 147 | <h4>History</h4> |
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| 148 | Sebastien Masson (smasson@lodyc.jussieu.fr) |
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| 149 | 10 juin 2000 |
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| 173 | <p><font color="gray" size="-3"> Produced by IDLdoc 2.0.</font></p> |
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| 175 | </body> |
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| 176 | </html> |
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