#include <output/charts/piechart.h>
#include <output/chart.h>
#include <output/charts/plot-hist.h>
+#include <math/histogram.h>
#include "gettext.h"
#define _(msgid) gettext (msgid)
/* (headers) */
-#include <libpspp/debug-print.h>
-
/* (specification)
FREQUENCIES (frq_):
*variables=custom;