Scilab Wavelet Toolbox Function
Last update : June 2007
dwt - Discrete Fast Wavelet Transform
Calling Sequence
-
[cA,cD]=dwt(x,wname,['mode',extMethod])
-
[cA,cD]=dwt(x,Lo_D,Hi_D,['mode',extMethod])
Parameters
-
wname
: wavelet name
-
x
: double vector
-
Lo_D
: lowpass analysis filter
-
Hi_D
: highpass analysis filter
-
extMethod
: extension mode, 'zpd' for example
-
cA
: approximation coefficent
-
cD
: detail coefficent
Description
dwt is for discrete fast wavelet transform with the signal extension method optional argument.
Examples
x=rand(1,100);
[cA,cD]=dwt(x,'db2','mode','asymh');
Author
Roger Liu and Isaac Zhi
See Also
idwt
,