ch = chart_create();
chart_write_title(ch, _("HISTOGRAM"));
chart_write_ylabel(ch, _("Frequency"));
chart_write_xlabel(ch, factorname);
ch = chart_create();
chart_write_title(ch, _("HISTOGRAM"));
chart_write_ylabel(ch, _("Frequency"));
chart_write_xlabel(ch, factorname);
chart_write_yscale(ch, 0, gsl_histogram_max_val(hist), 5);
for ( i = 0 ; i < bins ; ++i )
chart_write_yscale(ch, 0, gsl_histogram_max_val(hist), 5);
for ( i = 0 ; i < bins ; ++i )