input signal (possibly complex-valued)

input

number of powers of 2 for the scale variable

noctave

number of scales in each octave
(i.e. between two consecutive powers of 2).

nvoice

logical variable set to T to organize the output as a 2D array 
(signal\_size x nb\_scales), otherwise, the output is a 3D array 
(signal\_size x noctave x nvoice).

twoD

if set to T, display the modulus of the
continuous wavelet transform on the graphic device.

plot

Computes the continuous wavelet transform with for the (complex-valued) 
Morlet wavelet.

A set of R functions which provide an
environment for the Time-Frequency analysis of 1-D signals (and
especially for the wavelet and Gabor transforms of noisy
signals). It was originally written for Splus by Rene Carmona,
Bruno Torresani, and Wen L. Hwang, first at the University of
California at Irvine and then at Princeton University.  Credit
should also be given to Andrea Wang whose functions on the
dyadic wavelet transform are included. Rwave is based on the
book: "Practical Time-Frequency Analysis: Gabor and Wavelet
Transforms with an Implementation in S", by Rene Carmona, Wen
L. Hwang and Bruno Torresani (1998, eBook ISBN:978008053942), Academic Press.

Jonathan Lees

Rwave

Time-Frequency Analysis of 1-D Signals

Rene Carmona

Bruno Torresani

Brandon Whitcher

Andrea Wang

Wen-Liang Hwang

Robert Alberts

Jonathan M. Lees

cwt function

<dl><dt>input</dt>
<dd>input signal (possibly complex-valued)</dd><dt>noctave</dt>
<dd>number of powers of 2 for the scale variable</dd><dt>nvoice</dt>
<dd>number of scales in each octave
(i.e. between two consecutive powers of 2).</dd><dt>w0</dt>
<dd>central frequency of the wavelet.</dd><dt>twoD</dt>
<dd>logical variable set to T to organize the output as a 2D array 
(signal\_size x nb\_scales), otherwise, the output is a 3D array 
(signal\_size x noctave x nvoice).</dd><dt>plot</dt>
<dd>if set to T, display the modulus of the
continuous wavelet transform on the graphic device.</dd>
</dl>

Arguments

Continuous Wavelet Transform — cwt

<dl>

<dt>input</dt>
<dd>input signal (possibly complex-valued)</dd>

<dt>noctave</dt>
<dd>number of powers of 2 for the scale variable</dd>

<dt>nvoice</dt>
<dd>number of scales in each octave
(i.e. between two consecutive powers of 2).</dd>

<dt>w0</dt>
<dd>central frequency of the wavelet.</dd>

<dt>twoD</dt>
<dd>logical variable set to T to organize the output as a 2D array 
(signal\_size x nb\_scales), otherwise, the output is a 3D array 
(signal\_size x noctave x nvoice).</dd>

<dt>plot</dt>
<dd>if set to T, display the modulus of the
continuous wavelet transform on the graphic device.</dd>
</dl>

cwt: Continuous Wavelet Transform

Description

Usage

Value

Arguments

Details

References

See Also

Examples