dsc->vars[i].moments = moments_create (dsc->max_moment);
/* Data pass. */
- grouper = casegrouper_create_splits (proc_open (ds), dict);
+ grouper = casegrouper_create_splits (proc_open_filtering (ds, z_cnt == 0),
+ dict);
while (casegrouper_get_next_group (grouper, &group))
calc_descriptives (dsc, group, ds);
ok = casegrouper_destroy (grouper);