Program sfigrad | Gradient on the first axis. 
[SYNOPSIS]
sfigrad < in.rsf > out.rsf square=n adj=n
[PARAMETERS]
bool    | adj | =n |  [y/n] | 	adjoint flag 
bool    | square | =n |  [y/n] | 	if y, use gradient squared 
[DIRECTORY]
system/generic
