Program sffftone | Test 1-D Fourier transform. 
[SYNOPSIS]
sffftone < freq.rsf > space.rsf inv=n n1=
[PARAMETERS]
bool    | inv | =n |  [y/n] | 	inverse flag 
int     | n1 | = |   | 	dimension (for inv=y) 
[DIRECTORY]
user/fomels
