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<h2>
<span class="refentrytitle">specaddm</span>
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<p>specaddm —
Perform a weighted add of two input spectra.
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<div class="refsect1" title="Description">
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<h2>Description</h2>
<p>
Perform a weighted add of two input spectra.
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<div class="refsect1" title="Syntax">
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<h2>Syntax</h2>
<pre class="synopsis">wsig <span class="command"><strong>specaddm</strong></span> wsig1, wsig2 [, imul2]</pre>
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<h2>Initialization</h2>
<p>
<span class="emphasis"><em>imul2</em></span> (optional, default=0) -- if non-zero, scale the <span class="emphasis"><em>wsig2</em></span> magnitudes before adding. The default value is 0.
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<div class="refsect1" title="Performance">
<a id="idp44831048"></a>
<h2>Performance</h2>
<p>
<span class="emphasis"><em>wsig1</em></span> -- the first input spectra.
</p>
<p>
<span class="emphasis"><em>wsig2</em></span> -- the second input spectra.
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<p>
Do a weighted add of two input spectra. For each channel of the two input spectra, the two magnitudes are combined and written to the output according to:
</p>
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<p><br />
magout = mag1in + mag2in * imul2</p>
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<p>
The operation is performed whenever the input <span class="emphasis"><em>wsig1</em></span> is sensed to be new. This unit will (at Initialization) verify the consistency of the two spectra (equal size, equal period, equal mag types).
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<h2>See Also</h2>
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<a class="link" href="specdiff.html" title="specdiff"><em class="citetitle">specdiff</em></a>,
<a class="link" href="specfilt.html" title="specfilt"><em class="citetitle">specfilt</em></a>,
<a class="link" href="spechist.html" title="spechist"><em class="citetitle">spechist</em></a>,
<a class="link" href="specscal.html" title="specscal"><em class="citetitle">specscal</em></a>
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