Added Boxplots to the EXAMINE subcommand repertoire

[pspp-builds.git] / src / chart.h

diff --git a/src/chart.h b/src/chart.h
index d22c394fdb21a0a21864fcaa26c5c24b5ec5d079..eec5bff5b847a1d6d3b679c28156919c1b8651bd 100644 (file)
--- a/src/chart.h
+++ b/src/chart.h
@@ -61,7 +61,7 @@ struct chart {
 
   char fill_colour[10];
 
-  /* Stuff Particular to Cartesians */
+  /* Stuff Particular to Cartesians (and Boxplots ) */
   double ordinate_scale;
   double abscissa_scale;
   double x_min;
@@ -77,6 +77,7 @@ int  chart_initialise(struct chart *ch);
 void chart_finalise(struct chart *ch);
 
 
+double chart_rounded_tick(double tick);
 
 void chart_write_xlabel(struct chart *ch, const char *label);
 void chart_write_ylabel(struct chart *ch, const char *label);
@@ -118,10 +119,19 @@ struct normal_curve
 void histogram_write_legend(struct chart *ch, const struct normal_curve *norm);
 
 
+/* Plot a gsl_histogram */
 void histogram_plot(const gsl_histogram *hist, const char *factorname,
                    const struct normal_curve *norm, short show_normal);
 
 
+/* Create a gsl_histogram and set it's parameters based upon 
+   x_min, x_max and bins. 
+   The caller is responsible for freeing the histogram.
+*/
+gsl_histogram * histogram_create(double bins, double x_min, double x_max) ;
+
+
+
 
 
 struct slice {
@@ -156,6 +166,17 @@ void chart_write_yscale(struct chart *ch,
 
 void chart_datum(struct chart *ch, int dataset, double x, double y);
 
+struct metrics;
+
+
+void  boxplot_draw_boxplot(struct chart *ch,
+                          double box_centre, 
+                          double box_width,
+                          struct metrics *m,
+                          const char *name);
+
+
+void boxplot_draw_yscale(struct chart *ch , double y_max, double y_min);
 
 
 enum CHART_DIM