Added histograms into examine.
[pspp-builds.git] / src / chart.h
1 /* PSPP - computes sample statistics.
2    Copyright (C) 2004 Free Software Foundation, Inc.
3    Written by John Darrington <john@darrington.wattle.id.au>
4
5    This program is free software; you can redistribute it and/or
6    modify it under the terms of the GNU General Public License as
7    published by the Free Software Foundation; either version 2 of the
8    License, or (at your option) any later version.
9
10    This program is distributed in the hope that it will be useful, but
11    WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    General Public License for more details.
14
15    You should have received a copy of the GNU General Public License
16    along with this program; if not, write to the Free Software
17    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
18    02111-1307, USA. */
19
20
21 #ifndef CHART_H
22 #define CHART_H
23
24 #include <stdio.h>
25 #include <plot.h>
26 #include <gsl/gsl_histogram.h>
27
28 #include "var.h"
29
30
31 /* Array of standard colour names */
32 extern const char *data_colour[];
33
34
35 struct chart {
36
37   plPlotter *lp ;
38   plPlotterParams *pl_params;
39
40   /* The geometry of the chart 
41      See diagram at the foot of this file.
42    */
43   
44   int data_top   ;
45   int data_right ;
46   int data_bottom;
47   int data_left  ;
48
49   int abscissa_top;
50
51   int ordinate_right ;
52
53   int title_bottom ;
54
55   int legend_left ;
56   int legend_right ;
57
58   
59   /* Default font size for the plot (if zero, then use plotter default) */
60   int font_size; 
61
62   char fill_colour[10];
63
64   /* Stuff Particular to Cartesians */
65   double ordinate_scale;
66   double abscissa_scale;
67   double x_min;
68   double x_max;
69   double y_min;
70   double y_max;
71
72 };
73
74
75 int  chart_initialise(struct chart *ch);
76
77 void chart_finalise(struct chart *ch);
78
79
80
81 void chart_write_xlabel(struct chart *ch, const char *label);
82 void chart_write_ylabel(struct chart *ch, const char *label);
83
84 void chart_write_title(struct chart *ch, const char *title, ...);
85
86 enum tick_orientation {
87   TICK_ABSCISSA=0,
88   TICK_ORDINATE
89 };
90
91 void draw_tick(struct chart *ch, enum tick_orientation orientation, 
92                double position, const char *label, ...);
93
94
95
96 enum  bar_opts {
97   BAR_GROUPED =  0,
98   BAR_STACKED,
99   BAR_RANGE
100 };
101
102
103 void draw_barchart(struct chart *ch, const char *title, 
104                    const char *xlabel, const char *ylabel, enum bar_opts opt);
105
106 void draw_box_whisker_chart(struct chart *ch, const char *title);
107
108
109
110 struct normal_curve
111 {
112   double N ;
113   double mean ;
114   double stddev ;
115 };
116
117
118 void histogram_write_legend(struct chart *ch, const struct normal_curve *norm);
119
120
121 void histogram_plot(const gsl_histogram *hist, const char *factorname,
122                     const struct normal_curve *norm, short show_normal);
123
124
125
126
127 struct slice {
128   const char *label;
129   double magnetude;
130 };
131
132
133
134
135 /* Draw a piechart */
136 void piechart_plot(const char *title,
137                    const struct slice *slices, int n_slices);
138
139 void draw_scatterplot(struct chart *ch);
140
141
142 void draw_lineplot(struct chart *ch);
143
144
145 /* Set the scale on chart CH.
146    The scale extends from MIN to MAX .
147    TICK is the approximate number of tick marks.
148 */
149
150 void chart_write_xscale(struct chart *ch, 
151                         double min, double max, int ticks);
152
153 void chart_write_yscale(struct chart *ch, 
154                         double min, double max, int ticks);
155
156
157 void chart_datum(struct chart *ch, int dataset, double x, double y);
158
159
160
161 enum CHART_DIM
162   {
163     CHART_DIM_X,
164     CHART_DIM_Y
165   };
166
167
168 void chart_line(struct chart *ch, double slope, double intercept, 
169                 double limit1, double limit2, enum CHART_DIM limit_d);
170
171
172 #endif
173
174 #if 0
175 The anatomy of a chart is as follows.
176
177 +-------------------------------------------------------------+
178 |            +----------------------------------+             |
179 |            |                                  |             |
180 |            |          Title                   |             |
181 |            |                                  |             |
182 |            +----------------------------------+             |
183 |+----------++----------------------------------++-----------+|
184 ||          ||                                  ||           ||
185 ||          ||                                  ||           ||
186 ||          ||                                  ||           ||
187 ||          ||                                  ||           ||
188 ||          ||                                  ||           ||
189 ||          ||                                  ||           ||
190 ||          ||                                  ||           ||
191 ||          ||                                  ||           ||
192 ||          ||                                  ||           ||
193 ||          ||                                  ||           ||
194 || Ordinate ||            Data                  ||  Legend   ||
195 ||          ||                                  ||           ||
196 ||          ||                                  ||           ||
197 ||          ||                                  ||           ||
198 ||          ||                                  ||           ||
199 ||          ||                                  ||           ||
200 ||          ||                                  ||           ||
201 ||          ||                                  ||           ||
202 ||          ||                                  ||           ||
203 ||          ||                                  ||           ||
204 ||          ||                                  ||           ||       
205 |+----------++----------------------------------++-----------+|   --  
206 |            +----------------------------------+             | -  ^  data_bottom
207 |            |          Abscissa                |             | ^  |             
208 |            |                                  |             | | abscissa_top
209 |            +----------------------------------+             | v  v  
210 +-------------------------------------------------------------+ ----  
211                                                 
212 ordinate_right                                  ||           |
213 |           |                                   ||           |
214 |<--------->|                                   ||           |
215 |            |                                  ||           |
216 | data_left  |                                  ||           |
217 |<---------->|                                  ||           |
218 |                                               ||           |
219 |               data_right                      ||           |
220 |<--------------------------------------------->||           |
221 |                  legend_left                   |           |
222 |<---------------------------------------------->|           |
223 |                    legend_right                            |
224 |<---------------------------------------------------------->|
225                                                              
226 #endif