Synopsis
		sfscale < in.rsf > out.rsf axis=0 rscale=0. dscale=1.

To scale by a constant factor, you can also use sfmath.

Parameters
		int axis=0 Scale by maximum in the dimensions up to this axis.   float dscale=1. Scale by this factor (works if rscale=0)   float rscale=0. Scale by this factor.