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<h2><b>mag </b></h2><p>
<code>mag(<i>uexpr,vexpr</i>) </code><p>
Performs the calculation:
<code>sqrt(<i>uexpr*uexpr+vexpr*vexpr</i>)</code>. May be used with
gridded or station data.
<H3>Usage Notes</H3><P>
<H3>Examples</H3><P>
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