Program sfrandcut | cut a random dataset from a 3D cube 
[SYNOPSIS]
sfrandcut < Fi.rsf > Fo.rsf rr=Fr.rsf verb=n axis=2
[PARAMETERS]
int     | axis | =2 |   | 	stack axis 
file    | rr | = |   | 	auxiliary input file name
bool    | verb | =n |  [y/n] | 	verbosity flag 
[DIRECTORY]
user/psava
