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header improvements : type of parameters and keywords, default values, spell checking + idldoc assistant (IDL online_help)
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4  <head>
5    <title>undefine.pro (SAXO Documentation Assistant)</title>
6  </head>
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57    <h1><font size="-2">Utilities/</font></h1>
58    <h2>undefine.pro</h2>
59
60    <dl>
61    </dl>
62
63     
64 erase a variable
65 same thing that delvar but usable in a program and usable
66 for one variable simultaneously
67
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71     
72      <a name="#_undefine"></a>
73
74      <h2>undefine  <font size="-1" color="#006633"> 
75 Utilities 
76 </font></h2>
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78      <p><font face="Courier">undefine<i>, <a href="#_undefine_keyword_varname">varname</a></i></font></p>
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86    <h3>Parameters</h3>
87   
88
89    <a name="#_undefine_keyword_varname"></a>
90    <h4>varname&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
91      <font size="-1" color="#006633">in</font>
92     
93     
94      <font size="-1" color="#006633">required</font>
95     
96     
97     
98     
99    </h4>
100
101     
102 The name of the variable we want erase
103
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109    <h3>Examples</h3>
110 IDL> a=1
111 IDL> undefine,a
112 % Compiled module: UNDEFINE.
113 IDL> help, a
114 A               UNDEFINED = <Undefined>
115
116    <h3>Version history</h3>
117   
118    <h4>Version</h4> $Id: undefine.pro 157 2006-08-21 09:01:50Z navarro $
119
120    <h4>History</h4> trouve sur la page web de D.Fanning
121 http://www.dfanning.com :
122QUESTION: How do I make an IDL variable have a type "undefined"?
123ANSWER: At the main IDL level you can use the IDL procedure DELVAR to
124delete an IDL variable and make it undefined. Inside of procedures
125and functions, I use this little program named UNDEFINE that I got
126from Andrew Cool at the DSTO High Frequency Radar Division in
127Adelaide, Australia.
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145    <font size="-3"><p>&nbsp;</p></font>
146    <hr size="1" color="#CCCCCC"/>
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151    <p><font color="gray" size="-3">&nbsp;&nbsp;Produced by IDLdoc 2.0 on Tue Aug 29 14:50:58 2006.</font></p>
152
153  </body>
154</html>
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