Program sffreqest | Local frequency estimation 
[SYNOPSIS]
sffreqest < in.rsf > out.rsf niter=100 hertz=n rect1=1 rect2=1 ... 
[COMMENTS]
rectN defines the size of the smoothing stencil in N-th dimension.

[PARAMETERS]
bool    | hertz | =n |  [y/n] | 	if y, convert output to Hertz 
int     | niter | =100 |   | 	number of iterations 
[DIRECTORY]
user/fomels
