NAME

Filter - filter a dataset


SYNOPSIS

Filter <in.H filter=filter.H pad=zero > out.H


INPUT PARAMETERS

n1,n2,n3 - integer
       cube dimensions (n1<4096)
n1 - integer
       length of the filter(from auxilary file)
pad - string
       zero: pad data with zeros 
       duplicate: pad with samples at ends of data
filter - char*
       name of the auxiliary history file containing the filter coefficients


DESCRIPTION

  Filtering over 1 dimension performed in the frequency domain
        The filter is input as the history file


COMMENTS

        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.


CATEGORY

seis/filter