Scilab Wavelet Toolbox Function
Last update : Feburary 2006

dwt - one dimensional fast discrete wavelet transform

Calling Sequence

[a,d]=dwt(sig,wavename,[extension_method])

Parameters

Description

This function performs one dimensional fast discrete wavelet transform and get two type of coefficient, approximation and detail. Different signal extension methods affect the result except haar ('haar') or daubechies wavelet (db1). Detailed algorithm is fully described in userguide.

Examples


-->sig=rand(1,64);
-->[a,d]=dwt(sig,'db2','zpd');

-->sig=rand(64,64);
-->[a,d]=dwt(sig,'db2','zpd');
Please use dwt2 instead!

-->[a,d]=dwt(3,'db2','symh');  
Please use shorter wavelets!

  

See Also

idwt ,   dwt2 ,   idwt2