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<!--Copyright (C) 1988-2005 by the Institute of Global Environment and Society (IGES). See file COPYRIGHT for more information.-->
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<title>GrADS Command: q sdfwrite</title>
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<h2><b>q sdfwrite</b></h2>
<p><code>q sdfwrite</code>
<p>This command returns information on the status of the <code>sdfwrite</code> options:
<ol>
<li>The name of the <code>sdfwrite</code> output file
<li>The format of the output file
<br>
<li>The output file's chunk dimensions, if the format is compressed.
<li>The output undef value
<li>Any attributes that have been set by the user
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<p>
<h3>Usage Notes</h3>
<li>This command is available in GrADS v2.0.a3 or higher.
<li>The command to create the self-describing file is <code><a href="gradcomdsdfwrite.html">sdfwrite</a></code>.
<li>The command to set or change the self-describing output filename is <code><a href="gradcomdsetsdfwrite.html">set sdfwrite</a></code>.
<li>The command to set attributes for the self-describing file is <code><a href="gradcomdsetsdfattr.html">set sdfattr</a></code>.
<li>The <code><a href="gradcomdreset.html">reset</a></code> command will reset the sdfwrite filename to the default and release all the attributes. To do this without resetting all the other user-specified options, use the <code><a href="gradcomdclear.html">clear sdfwrite</a></code> command.</li>
<li>Please see the documentation on <a href="compression.html">compression</a> for more details. </li>
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<h3> </h3>
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