&slice_analysis STRING output = NULL; long n_slices = 0; double s_start = 0; double s_end = 1e300; long final_values_only = 0; &end
output -- The (incomplete) filename of the output file.
	Recommended value is ``n_slices -- Number of slices to use.
s_start, s_end -- Position in beamline at which to start
        and stop performing slice analysis.
final_values_only -- If nonzero, then slice quantities are computed
        only at the end of the beamline.