Synopsis
		sfvariogram2 < in.rsf > out.rsf verb=n dh1=1 nh1=n1/dh1 dh2=1 nh2=n2/dh2 semi=y

Parameters
		int dh1=1 interval (jump) of variogram lag in first axis   int dh2=1 interval (jump) of variogram lag in second axis   int nh1=n1/dh1 number of variogram lag in first axis   int nh2=n2/dh2 number of variogram lag in second axis   bool semi=y [y/n] if y, output semivariogram   bool verb=n [y/n] verbosity