Program sfavo | Compute intercept and gradient by least squares. 
[SYNOPSIS]
sfavo < cmp.rsf > avo.rsf offset=offset.rsf half=y
[PARAMETERS]
bool    | half | =y |  [y/n] | 	if y, the second axis is half-offset instead of full offset 
string  | offset | = |   | 	auxiliary input file name
[DIRECTORY]
system/seismic
