Filter - filter a dataset
Filter filter=filter.H pad=zero < in.H > out.H
cube dimensions (n1<4096)
length of the filter(from auxilary file)
zero: pad data with zeros duplicate: pad with samples at ends of data
Filtering over 1 dimension performed in the frequency domain
The length of the data when performing the filtering is zero padded to be the next power of 2 greater than or equal to max(5/4*n1,n1wavelet). This avoids wraparound artifacts.