1 /* PSPP - A program for statistical analysis . -*-c-*-
3 Copyright (C) 2004 Free Software Foundation, Inc.
4 Author: John Darrington 2004
6 This program is free software; you can redistribute it and/or
7 modify it under the terms of the GNU General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
11 This program is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
25 /* FIXME: These things should probably be amalgamated with the
26 group_statistics struct */
28 #include <libpspp/hash.h>
29 #include <data/value.h>
31 #include <gsl/gsl_histogram.h>
32 #include "percentiles.h"
55 struct moments1 *moments;
57 gsl_histogram *histogram;
64 /* A hash of data for this factor. */
65 struct hsh_table *ordered_data;
67 /* A Pointer to this hash table AFTER it has been SORTED and crunched */
68 struct weighted_value **wvp;
70 /* The number of values in the above array
71 (if all the weights are 1, then this will
75 /* Percentile stuff */
77 /* A hash of struct percentiles */
78 struct hsh_table *ptile_hash;
80 /* Algorithm to be used for calculating percentiles */
81 enum pc_alg ptile_alg;
89 struct metrics * metrics_create(void);
91 void metrics_precalc(struct metrics *m);
93 void metrics_calc(struct metrics *m, const union value *f, double weight,
96 void metrics_postcalc(struct metrics *m);
98 void metrics_destroy(struct metrics *m);
102 /* Linked list of case nos */
106 struct case_node *next;
109 struct weighted_value
116 /* The cumulative weight */
122 /* Linked list of cases nos which have this value */
123 struct case_node *case_nos;
128 struct weighted_value *weighted_value_create(void);
130 void weighted_value_free(struct weighted_value *wv);
134 struct factor_statistics {
136 /* The values of the independent variables */
139 /* The an array stats for this factor, one for each dependent var */
142 /* The number of dependent variables */
147 /* Create a factor statistics object with for N dependent vars
148 and ID as the value of the independent variable */
149 struct factor_statistics *
150 create_factor_statistics (int n, union value *id0, union value *id1);
153 void factor_statistics_free(struct factor_statistics *f);
156 /* Compare f0 and f1.
157 width is the width of the independent variable */
159 factor_statistics_compare(const struct factor_statistics *f0,
160 const struct factor_statistics *f1, int width);
165 factor_statistics_hash(const struct factor_statistics *f, int width);