[R] what's the R code for wavelet decomposition (Haar transformation)?

[Zhen Li]

Dear all,

Using R function "dwt", it seems that I cannot specify the wavelet 
transformation like Haar. What's the R code for wavelet decomposition 
which allows me to specify Haar wavelet transformation? Of course, if it 
can include "db2", that is even better. In general, I want an R function 
like matlab code "dwt". Thanks in advance!

Zhen Li