Program sfdiphase | Derivative of local frequency. 
[SYNOPSIS]
sfdiphase < df.rsf sig=in.rsf > out.rsf verb=n niter=100 order=100 ref=1. hertz=n rect#=(1,1,...)
[PARAMETERS]
bool    | hertz | =n |  [y/n] | 	if y, convert output to Hertz 
int     | niter | =100 |   | 	number of iterations 
int     | order | =100 |   | 	Hilbert transformer order 
int     | rect# | =(1,1,...) |   | 	smoothing radius on #-th axis 
float   | ref | =1. |   | 	Hilbert transformer reference (0.5 < ref <= 1) 
file    | sig | = |   | 	auxiliary input file name
bool    | verb | =n |  [y/n] | 	verbosity 
[DIRECTORY]
user/fomels
