[cA,cD] = dwt(sig, 'db1'); i have used this code to decompose a signal and i have obtained CA and CD of Size (Ixn) but if i change the code to some other 'wname' like db2, db4 etc i am getting a signal of size of (I x(n-1)) but i require a size of (IXn). kindly help me how to solve this
Ravi Prakash Kandury
The dwt operates in different modes based on which the length of the decomposed signal is dependent.
This link might help you.
http://www.mathworks.com/help/wavelet/ref/dwtmode.html?refresh=true
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Koredianto Usman
Before you do the DWT decomposition, you can add zero at the end of your signal.
sig = [sig 0]
[cA,cD] = dwt(sig, 'db2');
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