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<html><head><title>R: Kernel for Reconstruction from Wavelet Ridges</title>
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<table width="100%" summary="page for rkernel {Rwave}"><tr><td>rkernel {Rwave}</td><td align="right">R Documentation</td></tr></table>
<h2>Kernel for Reconstruction from Wavelet Ridges</h2>


<h3>Description</h3>

<p>
Computes the cost from the sample of points on the estimated ridge
and the matrix used in the reconstruction of the original signal,
in the case of real constraints. Modification of the function
<code><a href="kernel.html">kernel</a></code>.
</p>


<h3>Usage</h3>

<pre>
rkernel(node, phinode, nvoice, x.inc=1, x.min=node[1],
x.max=node[length(node)], w0=2 * pi, plot=FALSE)
</pre>


<h3>Arguments</h3>

<table summary="R argblock">
<tr valign="top"><td><code>node</code></td>
<td>
values of the variable b for the nodes of the ridge.
</td></tr>
<tr valign="top"><td><code>phinode</code></td>
<td>
values of the scale variable a for the nodes of the ridge.
</td></tr>
<tr valign="top"><td><code>nvoice</code></td>
<td>
number of scales within 1 octave.
</td></tr>
<tr valign="top"><td><code>x.inc</code></td>
<td>
step unit for the computation of the kernel.
</td></tr>
<tr valign="top"><td><code>x.min</code></td>
<td>
minimal value of x for the computation of <i>Q_2</i>.
</td></tr>
<tr valign="top"><td><code>x.max</code></td>
<td>
maximal value of x for the computation of <i>Q_2</i>.
</td></tr>
<tr valign="top"><td><code>w0</code></td>
<td>
central frequency of the wavelet.
</td></tr>
<tr valign="top"><td><code>plot</code></td>
<td>
if set to TRUE, displays the modulus of the matrix of <i>Q_2</i>.
</td></tr>
</table>

<h3>Details</h3>

<p>
Uses Romberg's method for computing the kernel.
</p>


<h3>Value</h3>

<p>
matrix of the <i>Q_2</i> kernel</p>

<h3>References</h3>

<p>
See discussions in the text of "Time-Frequency Analysis".
</p>


<h3>See Also</h3>

<p>
<code><a href="kernel.html">kernel</a></code>, <code><a href="fastkernel.html">fastkernel</a></code>, <code><a href="gkernel.html">gkernel</a></code>,
<code><a href="zerokernel.html">zerokernel</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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