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<html><head><title>R: Extrema of Dyadic Wavelet Transform</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<link rel="stylesheet" type="text/css" href="../../R.css">
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<table width="100%" summary="page for ext {Rwave}"><tr><td>ext {Rwave}</td><td align="right">R Documentation</td></tr></table>
<h2>Extrema of Dyadic Wavelet Transform</h2>


<h3>Description</h3>

<p>
Compute the local extrema of the dyadic wavelet transform modulus.
</p>


<h3>Usage</h3>

<pre>
ext(wt, scale=FALSE, plot=TRUE)
</pre>


<h3>Arguments</h3>

<table summary="R argblock">
<tr valign="top"><td><code>wt</code></td>
<td>
dyadic wavelet transform.
</td></tr>
<tr valign="top"><td><code>scale</code></td>
<td>
flag indicating if the extrema at each 
resolution will be plotted at the same scale.
</td></tr>
<tr valign="top"><td><code>plot</code></td>
<td>
if set to TRUE, displays the transform on the graphics device.
</td></tr>
</table>

<h3>Details</h3>




<h3>Value</h3>

<p>
Structure containing:
</p>
<table summary="R argblock">
<tr valign="top"><td><code>original</code></td>
<td>
original signal.
</td></tr>
<tr valign="top"><td><code>extrema</code></td>
<td>
extrema representation.
</td></tr>
<tr valign="top"><td><code>Sf</code></td>
<td>
coarse resolution of signal.
</td></tr>
<tr valign="top"><td><code>maxresoln</code></td>
<td>
number of decomposition scales.
</td></tr>
<tr valign="top"><td><code>np</code></td>
<td>
size of signal.
</td></tr>
</table>

<h3>References</h3>

<p>
See discussions in the text of ``Practical Time-Frequency Analysis''.
</p>


<h3>See Also</h3>

<p>
<code><a href="mw.html">mw</a></code>, <code><a href="mrecons.html">mrecons</a></code>.
</p>



<hr><div align="center">[Package <em>Rwave</em> version 1.24 <a href="00Index.html">Index]</a></div>

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