bool dataset_end_of_command (struct dataset *);
\f
+bool measure_guesser_is_needed (struct dataset *);
+void measure_guesser_run (struct dataset *, const struct casereader *);
+\f
const struct ccase *lagged_case (const struct dataset *ds, int n_before);
void dataset_need_lag (struct dataset *ds, int n_before);
\f