Synopsis
		sfhistogram < in.rsf > out.rsf n1= o1= d1=

The output grid is not centered on the bins; it marks their "left edge".
I.e., the first sample holds the number of values between o1 and o1+d1.

Parameters
		float d1= histogram sampling   int n1= number of histogram samples   float o1= histogram origin

Used In
		GEO391          hw1/dem hw3/fourier   RSF          rsf/sfnoise