Synopsis
		sfcosft < in.rsf > out.rsf sign#=0

The input and output are real and have the same dimensions.
Pad the data if you need to suppress wrap-around effects.

Parameters
		int sign#=0 transform along #-th dimension [+1 forward or -1 backward]

Used In
		BEI          dwnc/phasemod dwnc/sigmoid dwnc/vofz