gauswavf
Gaussian wavelet
Description
[
returns the psi
,x
] = gauswavf(lb
,ub
,n
,p
)p
th derivative.
p
is an integer from 1 through 8.
The Gaussian function is defined as . Cp is such that the
2-norm of the p
th derivative of
psi
is equal to 1.
Note
For visualizing the second or third order derivative of Gaussian wavelets, the convention is to use the negative of the normalized derivative. In the case of the second derivative, scaling by -1 produces a wavelet with its main lobe in the positive y direction. This scaling also makes the Gaussian wavelet resemble the Mexican hat, or Ricker, wavelet. The validity of the wavelet is not affected by the -1 scaling factor.
[
used the valid wavelet family short name psi
,x
] = gauswavf(lb
,ub
,n
,wname
)wname
plus the order
of the derivative in a character vector or string scalar, such as
'gaus4'
. To see valid character vectors for Gaussian
wavelets, use waveinfo('gaus')
or use
wavemngr('read',1)
and refer to the Gaussian section.
Examples
Input Arguments
Output Arguments
Version History
Introduced before R2006a