centfrq (Wavelet Toolbox)

Wavelet center frequency

Syntax

FREQ = centfrq('wname')
FREQ = centfrq('wname',ITER)
[FREQ,XVAL,RECFREQ] = centfrq('wname',ITER,'plot')

Description

FREQ = centfrq('wname') returns the center frequency in herz of the wavelet function, 'wname' (see wavefun for more information).

For FREQ = centfrq('wname',ITER), ITER is the number of iterations performed by the function wavefun, which is used to compute the wavelet.

[FREQ,XVAL,RECFREQ] = centfrq('wname',ITER,'plot') returns, in addition, the associated center frequency based approximation RECFREQ on the 2^ITER points grid XVAL and plots the wavelet function and RECFREQ.

Examples

% Example 1: a real wavelet 
wname = 'db2';

% Compute the center frequency and display
% the wavelet function and the associated 
% center frequency based approximation.
iter = 8;
cfreq = centfrq(wname,8,'plot')

cfreq =
    0.6667


% Example 2: a complex wavelet 
wname = 'cgau6';

% Compute the center frequency and display 
% the wavelet function and the associated 
% center frequency based approximation.
cfreq = centfrq(wname,8,'plot')

cfreq =

    0.6000

See Also
scal2frq, wavefun

bswfun cfs2wpt