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<span class="path"><a href="index.html">FOSSEE Signal Processing Toolbox</a> >> <a href="section_e54aa8aac34aa55341e8b4b782fe1a74.html">FOSSEE Signal Processing Toolbox</a> > cpsd</span>
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<div class="refnamediv"><h1 class="refname">cpsd</h1>
<p class="refpurpose">This function estimates cross power spectrum of data x and y by the Welch (1967) periodogram/FFT method.</p></div>
<div class="refsynopsisdiv"><h3 class="title">Calling Sequence</h3>
<div class="synopsis"><pre><span class="default">[</span><span class="default">PXX</span><span class="default">, </span><span class="default">FREQ</span><span class="default">] = </span><span class="functionid">cpsd</span><span class="default">(</span><span class="default">X</span><span class="default">, </span><span class="default">Y</span><span class="default">)</span>
<span class="default">[...] = </span><span class="functionid">cpsd</span><span class="default">(</span><span class="default">X</span><span class="default">, </span><span class="default">Y</span><span class="default">, </span><span class="default">WINDOW</span><span class="default">)</span>
<span class="default">[...] = </span><span class="functionid">cpsd</span><span class="default">(</span><span class="default">X</span><span class="default">, </span><span class="default">Y</span><span class="default">, </span><span class="default">WINDOW</span><span class="default">, </span><span class="default">OVERLAP</span><span class="default">)</span>
<span class="default">[...] = </span><span class="functionid">cpsd</span><span class="default">(</span><span class="default">X</span><span class="default">, </span><span class="default">Y</span><span class="default">, </span><span class="default">WINDOW</span><span class="default">, </span><span class="default">OVERLAP</span><span class="default">, </span><span class="default">NFFT</span><span class="default">)</span>
<span class="default">[...] = </span><span class="functionid">cpsd</span><span class="default">(</span><span class="default">X</span><span class="default">, </span><span class="default">Y</span><span class="default">, </span><span class="default">WINDOW</span><span class="default">, </span><span class="default">OVERLAP</span><span class="default">, </span><span class="default">NFFT</span><span class="default">, </span><span class="default">FS</span><span class="default">)</span>
<span class="default">[...] = </span><span class="functionid">cpsd</span><span class="default">(</span><span class="default">X</span><span class="default">, </span><span class="default">Y</span><span class="default">, </span><span class="default">WINDOW</span><span class="default">, </span><span class="default">OVERLAP</span><span class="default">, </span><span class="default">NFFT</span><span class="default">, </span><span class="default">FS</span><span class="default">, </span><span class="default">RANGE</span><span class="default">)</span>
<span class="functionid">cpsd</span><span class="default">(...)</span></pre></div></div>
<div class="refsection"><h3 class="title">Parameters</h3>
<dl><dt><span class="term">X, Y:</span>
<dd><p class="para">Matrix or integer</p></dd></dt></dl></div>
<div class="refsection"><h3 class="title">Description</h3>
<p class="para">Estimate cross power spectrum of data X and Y by the Welch (1967) periodogram/FFT method.</p></div>
<div class="refsection"><h3 class="title">Examples</h3>
<div class="programlisting"><table border="0" width="100%"><tr><td width="98%"><pre class="scilabcode"><span class="scilabopenclose">[</span><span class="scilabid">a</span><span class="scilabdefault">,</span> <span class="scilabid">b</span><span class="scilabopenclose">]</span> <span class="scilaboperator">=</span> <span class="scilabid">cpsd</span><span class="scilabopenclose">(</span><span class="scilabopenclose">[</span><span class="scilabnumber">1</span><span class="scilabdefault">,</span><span class="scilabnumber">2</span><span class="scilabdefault">,</span><span class="scilabnumber">3</span><span class="scilabopenclose">]</span><span class="scilabdefault">,</span><span class="scilabopenclose">[</span><span class="scilabnumber">4</span><span class="scilabdefault">,</span><span class="scilabnumber">5</span><span class="scilabdefault">,</span><span class="scilabnumber">6</span><span class="scilabopenclose">]</span><span class="scilabopenclose">)</span>
<span class="scilabid">ans</span> <span class="scilaboperator">=</span>
<span class="scilabid">b</span> <span class="scilaboperator">=</span>
<span class="scilabnumber">0.</span>
<span class="scilabnumber">0.25</span>
<span class="scilabnumber">0.5</span>
<span class="scilabid">a</span> <span class="scilaboperator">=</span>
<span class="scilabnumber">2.7804939</span>
<span class="scilabnumber">4.4785583</span> <span class="scilaboperator">+</span> <span class="scilabnumber">1.0743784</span><span class="scilabid">i</span>
<span class="scilabnumber">0.7729851</span></pre></td><td valign="top"><a href="scilab://scilab.execexample/"><img src="ScilabExecute.png" border="0"/></a></td><td valign="top"><a href="scilab://scilab.editexample/"><img src="ScilabEdit.png" border="0"/></a></td><td></td></tr></table></div></div>
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