Program sfprefilt | prefilter bank of pwd
[SYNOPSIS]
sfprefilt < input.rsf > dip.rsf coef=coef.rsf pf=pf.rsf nf=1 iter=5 eta=0.05
[PARAMETERS]
file    | coef | = |   | 	auxiliary output file name
float   | eta | =0.05 |   | 	
int     | iter | =5 |   | 	
int     | nf | =1 |   | 	
file    | pf | = |   | 	auxiliary output file name
[DIRECTORY]
user/chen
