X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Fstats%2Ffrequencies.q;h=b5ad8c47793eef15064a887023eead28732c8845;hb=7dfbf1beae10727cc07213b2c74a991859f9fcbc;hp=d7754220fa4efe7fc2a4861ef4a806fb9deb29b8;hpb=bb75ec3b2fe601c6b942f5cda283b82925dd745d;p=pspp

diff --git a/src/language/stats/frequencies.q b/src/language/stats/frequencies.q
index d7754220fa..b5ad8c4779 100644
--- a/src/language/stats/frequencies.q
+++ b/src/language/stats/frequencies.q
@@ -499,14 +499,17 @@ postcalc (struct frq_proc *frq, const struct dataset *ds)
 
 	  histogram = freq_tab_to_hist (frq, &vf->tab, vf->var);
 
-          chart_item_submit (histogram_chart_create (
+	  if ( histogram)
+	    {
+	      chart_item_submit (histogram_chart_create (
                                histogram->gsl_hist, var_to_string(vf->var),
                                vf->tab.valid_cases,
                                d[FRQ_MEAN],
                                d[FRQ_STDDEV],
                                frq->hist->draw_normal));
 
-	  statistic_destroy (&histogram->parent);
+	      statistic_destroy (&histogram->parent);
+	    }
 	}
 
       if (frq->pie)
@@ -1139,9 +1142,12 @@ freq_tab_to_hist (const struct frq_proc *frq, const struct freq_tab *ft,
   /* Freedman-Diaconis' choice of bin width. */
   iqr = calculate_iqr (frq);
   bin_width = 2 * iqr / pow (valid_freq, 1.0 / 3.0);
-  bin_width = chart_rounded_tick (bin_width);
 
   histogram = histogram_create (bin_width, x_min, x_max);
+
+  if ( histogram == NULL)
+    return NULL;
+
   for (i = 0; i < ft->n_valid; i++)
     {
       const struct freq *f = &ft->valid[i];