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<html><head><title>R: Ridge Extraction by Crazy Climbers</title>
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<table width="100%" summary="page for crc {Rwave}"><tr><td>crc {Rwave}</td><td align="right">R Documentation</td></tr></table>
<h2>Ridge Extraction by Crazy Climbers</h2>
<h3>Description</h3>
<p>
Uses the "crazy climber algorithm" to detect ridges in the modulus of
a continuous wavelet or a Gabor transform.
</p>
<h3>Usage</h3>
<pre>
crc(tfrep, tfspec=numeric(dim(tfrep)[2]), bstep=3, iteration=10000,
rate=0.001, seed=-7, nbclimb=10, flag.int=TRUE, chain=TRUE,
flag.temp=FALSE)
</pre>
<h3>Arguments</h3>
<table summary="R argblock">
<tr valign="top"><td><code>tfrep</code></td>
<td>
modulus of the (wavelet or Gabor) transform.
</td></tr>
<tr valign="top"><td><code>tfspec</code></td>
<td>
numeric vector which gives, for each value of the scale or frequency the
expected size of the noise contribution.
</td></tr>
<tr valign="top"><td><code>bstep</code></td>
<td>
stepsize for random walk of the climbers.
</td></tr>
<tr valign="top"><td><code>iteration</code></td>
<td>
number of iterations.
</td></tr>
<tr valign="top"><td><code>rate</code></td>
<td>
initial value of the temperature.
</td></tr>
<tr valign="top"><td><code>seed</code></td>
<td>
initial value of the random number generator.
</td></tr>
<tr valign="top"><td><code>nbclimb</code></td>
<td>
number of crazy climbers.
</td></tr>
<tr valign="top"><td><code>flag.int</code></td>
<td>
if set to TRUE, the weighted occupation measure is computed.
</td></tr>
<tr valign="top"><td><code>chain</code></td>
<td>
if set to TRUE, chaining of the ridges is done.
</td></tr>
<tr valign="top"><td><code>flag.temp</code></td>
<td>
if set to TRUE: constant temperature.
</td></tr>
</table>
<h3>Details</h3>
<h3>Value</h3>
<p>
Returns a 2D array called beemap containing the (weighted or unweighted)
occupation measure (integrated with respect to time)</p>
<h3>References</h3>
<p>
See discussion in text of ``Practical Time-Frequency Analysis''.
</p>
<h3>See Also</h3>
<p>
<code><a href="corona.html">corona</a></code>, <code><a href="icm.html">icm</a></code>, <code><a href="coronoid.html">coronoid</a></code>,
<code><a href="snake.html">snake</a></code>, <code><a href="snakoid.html">snakoid</a></code> for ridge estimation,
<code><a href="cfamily.html">cfamily</a></code> for chaining and
<code><a href="crcrec.html">crcrec</a></code>,<code><a href="gcrcrec.html">gcrcrec</a></code>,<code><a href="scrcrec.html">scrcrec</a></code> for
reconstruction.
</p>
<hr><div align="center">[Package <em>Rwave</em> version 1.24 <a href="00Index.html">Index]</a></div>
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