This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
- (at your option) any later version.
+ (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
#include <data/variable.h>
#include <libpspp/hash.h>
#include <output/chart.h>
+#include <math/histogram.h>
+#include <math/moments.h>
#include "gettext.h"
#define _(msgid) gettext (msgid)
/* Write the legend of the chart */
-void
-histogram_write_legend(struct chart *ch, const struct normal_curve *norm)
+static void
+histogram_write_legend (struct chart *ch, double n, double mean, double stddev)
{
char buf[100];
- if ( !ch )
+
+ if (!ch)
return ;
- pl_savestate_r(ch->lp);
+ pl_savestate_r (ch->lp);
- sprintf(buf,"N = %.2f",norm->N);
- pl_move_r(ch->lp, ch->legend_left, ch->data_bottom);
- pl_alabel_r(ch->lp,0,'b',buf);
+ sprintf (buf, "N = %.2f", n);
+ pl_move_r (ch->lp, ch->legend_left, ch->data_bottom);
+ pl_alabel_r (ch->lp, 0, 'b', buf);
- sprintf(buf,"Mean = %.1f",norm->mean);
- pl_fmove_r(ch->lp,ch->legend_left,ch->data_bottom + ch->font_size * 1.5);
- pl_alabel_r(ch->lp,0,'b',buf);
+ sprintf (buf, "Mean = %.1f", mean);
+ pl_fmove_r (ch->lp,ch->legend_left,ch->data_bottom + ch->font_size * 1.5);
+ pl_alabel_r (ch->lp, 0, 'b', buf);
- sprintf(buf,"Std. Dev = %.2f",norm->stddev);
- pl_fmove_r(ch->lp,ch->legend_left,ch->data_bottom + ch->font_size * 1.5 * 2);
- pl_alabel_r(ch->lp,0,'b',buf);
+ sprintf (buf, "Std. Dev = %.2f", stddev);
+ pl_fmove_r (ch->lp, ch->legend_left, ch->data_bottom + ch->font_size * 1.5 * 2);
+ pl_alabel_r (ch->lp, 0, 'b', buf);
- pl_restorestate_r(ch->lp);
+ pl_restorestate_r (ch->lp);
}
-static void hist_draw_bar(struct chart *ch, const gsl_histogram *hist, int bar);
+static void hist_draw_bar (struct chart *ch, const struct histogram *hist, int bar);
static void
-hist_draw_bar(struct chart *ch, const gsl_histogram *hist, int bar)
+hist_draw_bar (struct chart *ch, const struct histogram *hist, int bar)
{
- if ( !ch )
+ if (!ch)
return ;
-
{
double upper;
double lower;
double height;
- const size_t bins = gsl_histogram_bins(hist);
+ const size_t bins = gsl_histogram_bins (hist->gsl_hist);
const double x_pos = (ch->data_right - ch->data_left) * bar / (double) bins ;
const double width = (ch->data_right - ch->data_left) / (double) bins ;
+ assert ( 0 == gsl_histogram_get_range (hist->gsl_hist, bar, &lower, &upper));
- assert ( 0 == gsl_histogram_get_range(hist, bar, &lower, &upper));
-
- assert( upper >= lower);
+ assert ( upper >= lower);
- height = gsl_histogram_get(hist, bar) *
- (ch->data_top - ch->data_bottom) / gsl_histogram_max_val(hist);
+ height = gsl_histogram_get (hist->gsl_hist, bar) *
+ (ch->data_top - ch->data_bottom) / gsl_histogram_max_val (hist->gsl_hist);
- pl_savestate_r(ch->lp);
- pl_move_r(ch->lp,ch->data_left, ch->data_bottom);
- pl_fillcolorname_r(ch->lp, ch->fill_colour);
- pl_filltype_r(ch->lp,1);
+ pl_savestate_r (ch->lp);
+ pl_move_r (ch->lp,ch->data_left, ch->data_bottom);
+ pl_fillcolorname_r (ch->lp, ch->fill_colour);
+ pl_filltype_r (ch->lp,1);
- pl_fboxrel_r(ch->lp,
+ pl_fboxrel_r (ch->lp,
x_pos, 0,
x_pos + width, height);
- pl_restorestate_r(ch->lp);
+ pl_restorestate_r (ch->lp);
draw_tick (ch, TICK_ABSCISSA,
x_pos + width / 2.0, "%g", (upper + lower) / 2.0);
+void
+histogram_plot (const struct histogram *hist,
+ const char *label,
+ const struct moments1 *m)
+{
+ double mean, var, n;
+
+ moments1_calculate (m, &n, &mean, &var, NULL, NULL);
+
+ histogram_plot_n (hist, label, n, mean, sqrt(var), m);
+}
+
+/* This function is deprecated. Don't use it in new code */
void
-histogram_plot(const gsl_histogram *hist,
- const char *factorname,
- const struct normal_curve *norm, short show_normal)
+histogram_plot_n (const struct histogram *hist,
+ const char *label,
+ double n, double mean, double stddev,
+ bool show_normal)
{
int i;
int bins;
- struct chart *ch;
-
- ch = chart_create();
- if (ch == NULL)
- return;
+ struct chart *ch = chart_create ();
- chart_write_title(ch, _("HISTOGRAM"));
+ chart_write_title (ch, _("HISTOGRAM"));
- chart_write_ylabel(ch, _("Frequency"));
- chart_write_xlabel(ch, factorname);
+ chart_write_ylabel (ch, _("Frequency"));
+ chart_write_xlabel (ch, label);
if ( ! hist ) /* If this happens, probably all values are SYSMIS */
{
- chart_submit(ch);
- return ;
+ chart_submit (ch);
+ return;
}
else
{
- bins = gsl_histogram_bins(hist);
+ bins = gsl_histogram_bins (hist->gsl_hist);
}
- chart_write_yscale(ch, 0, gsl_histogram_max_val(hist), 5);
+ chart_write_yscale (ch, 0, gsl_histogram_max_val (hist->gsl_hist), 5);
for ( i = 0 ; i < bins ; ++i )
- hist_draw_bar(ch, hist, i);
+ hist_draw_bar (ch, hist, i);
- histogram_write_legend(ch, norm);
+ histogram_write_legend (ch, n, mean, stddev);
- if ( show_normal )
- {
- /* Draw the normal curve */
-
- double d ;
- double x_min, x_max, not_used ;
- double abscissa_scale ;
- double ordinate_scale ;
- double range ;
-
- gsl_histogram_get_range(hist, 0, &x_min, ¬_used);
- range = not_used - x_min;
- gsl_histogram_get_range(hist, bins - 1, ¬_used, &x_max);
-
- abscissa_scale = (ch->data_right - ch->data_left) / (x_max - x_min);
- ordinate_scale = (ch->data_top - ch->data_bottom) /
- gsl_histogram_max_val(hist) ;
-
- pl_move_r(ch->lp, ch->data_left, ch->data_bottom);
- for( d = ch->data_left;
- d <= ch->data_right ;
- d += (ch->data_right - ch->data_left) / 100.0)
- {
- const double x = (d - ch->data_left) / abscissa_scale + x_min ;
- const double y = norm->N * range *
- gsl_ran_gaussian_pdf(x - norm->mean, norm->stddev);
-
- pl_fcont_r(ch->lp, d, ch->data_bottom + y * ordinate_scale);
-
- }
- pl_endpath_r(ch->lp);
+ if (show_normal)
+ {
+ /* Draw the normal curve */
+
+ double d ;
+ double x_min, x_max, not_used ;
+ double abscissa_scale ;
+ double ordinate_scale ;
+ double range ;
+
+ gsl_histogram_get_range (hist->gsl_hist, 0, &x_min, ¬_used);
+ range = not_used - x_min;
+ gsl_histogram_get_range (hist->gsl_hist, bins - 1, ¬_used, &x_max);
+
+ abscissa_scale = (ch->data_right - ch->data_left) / (x_max - x_min);
+ ordinate_scale = (ch->data_top - ch->data_bottom) /
+ gsl_histogram_max_val (hist->gsl_hist) ;
+
+ pl_move_r (ch->lp, ch->data_left, ch->data_bottom);
+ for ( d = ch->data_left;
+ d <= ch->data_right ;
+ d += (ch->data_right - ch->data_left) / 100.0)
+ {
+ const double x = (d - ch->data_left) / abscissa_scale + x_min ;
+ const double y = n * range *
+ gsl_ran_gaussian_pdf (x - mean, stddev);
+
+ pl_fcont_r (ch->lp, d, ch->data_bottom + y * ordinate_scale);
+
+ }
+ pl_endpath_r (ch->lp);
+ }
- }
- chart_submit(ch);
+ chart_submit (ch);
}
+
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