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90 erase a variable
91
92 same thing like <a href="/Applications/itt/idl64/help/online_help/DELVAR.html">DELVAR</a> but usable in a program and usable
93 for one variable simultaneously
94</div>
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104      <div id="routine_details">
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107        <div class="routine_details" id="_undefine">
108
109          <h2><a class="top" href="#container">top</a>undefine <span class="categories">
110 Utilities
111</span></h2>
112       
113          <p class="header">
114            undefine<span class="result">, <a href="#_undefine_param_varname">varname</a></span></p>
115       
116          <div class="comments">
117</div>
118
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121         
122            <h3>Parameters</h3>
123       
124           
125            <h4 id="_undefine_param_varname">varname&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
126              <span class="attr">in</span>
127             
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129              <span class="attr">required</span>
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133             
134            </h4>
135       
136          <div class="comments">
137 The name of the variable we want erase
138</div>
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145          <h3>Examples</h3><div class="preformat">
146   IDL> a=1
147   IDL> undefine,a
148 % Compiled module: UNDEFINE.
149   IDL> help, a
150 A               UNDEFINED = <Undefined>
151</div>
152          <h3>Version history</h3>
153         
154          <h4>Version</h4><div class="preformat">
155 $Id: undefine.pro 389 2009-01-27 08:59:35Z smasson $
156</div>
157          <h4>History</h4><div class="preformat">
158 trouve sur la page web de D.Fanning
159 <a href="http://www.dfanning.com"/> :
160QUESTION: How do I make an IDL variable have a type "undefined"?
161ANSWER: At the main IDL level you can use the IDL procedure <a href="/Applications/itt/idl64/help/online_help/DELVAR.html">DELVAR</a> to
162delete an IDL variable and make it undefined. Inside of procedures
163and functions, I use this little program named <a href="..//Utilities/undefine.html">undefine</a> that I got
164from Andrew Cool at the DSTO High Frequency Radar Division in
165Adelaide, Australia.
166</div>
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183          <h3>Statistics</h3>
184          <table class="statistics">
185            <tr><td>McCabe cyclic</td><td>           2</td></tr>
186            <tr><td>McCabe essential</td><td>           1</td></tr>
187            <tr><td>McCabe modular design</td><td>           1</td></tr>
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