Synopsis
		sfvariogram < in.rsf > out.rsf dh=1 oh=0 nh=n1/dh-oh semi=y

Parameters
		int dh=1 interval (number) of variogram lag   int nh=n1/dh-oh number of variogram lag   int oh=0 origin (number) of variogram lag   bool semi=y [y/n] if y, output semivariogram