Program sfcostaper | Cosine taper around the borders (N-D). 
[SYNOPSIS]
sfcostaper < in.rsf > out.rsf nw#=0
[COMMENTS]

April 2014 program of the month:
http://ahay.org/blog/2014/04/02/program-of-the-month-sfcostaper/

[PARAMETERS]
int     | nw# | =0 |   | 	tapering on #-th axis 
[DIRECTORY]
system/generic
