1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2004 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21 /* FIXME: These things should probably be amalgamated with the
22 group_statistics struct */
24 #include <libpspp/hash.h>
25 #include <data/value.h>
27 #include <gsl/gsl_histogram.h>
28 #include "percentiles.h"
51 struct moments1 *moments;
53 gsl_histogram *histogram;
60 /* A hash of data for this factor. */
61 struct hsh_table *ordered_data;
63 /* A Pointer to this hash table AFTER it has been SORTED and crunched */
64 struct weighted_value **wvp;
66 /* The number of values in the above array
67 (if all the weights are 1, then this will
71 /* Percentile stuff */
73 /* A hash of struct percentiles */
74 struct hsh_table *ptile_hash;
76 /* Algorithm to be used for calculating percentiles */
77 enum pc_alg ptile_alg;
85 struct metrics * metrics_create(void);
87 void metrics_precalc(struct metrics *m);
89 void metrics_calc(struct metrics *m, const union value *f, double weight,
92 void metrics_postcalc(struct metrics *m);
94 void metrics_destroy(struct metrics *m);
98 /* Linked list of case nos */
102 struct case_node *next;
105 struct weighted_value
112 /* The cumulative weight */
118 /* Linked list of cases nos which have this value */
119 struct case_node *case_nos;
124 struct weighted_value *weighted_value_create(void);
126 void weighted_value_free(struct weighted_value *wv);
130 struct factor_statistics {
132 /* The values of the independent variables */
135 /* The an array stats for this factor, one for each dependent var */
138 /* The number of dependent variables */
143 /* Create a factor statistics object with for N dependent vars
144 and ID as the value of the independent variable */
145 struct factor_statistics * create_factor_statistics (int n,
150 void factor_statistics_free(struct factor_statistics *f);
153 /* Compare f0 and f1.
154 width is the width of the independent variable */
156 factor_statistics_compare(const struct factor_statistics *f0,
157 const struct factor_statistics *f1, int width);
160 factor_statistics_hash(const struct factor_statistics *f, int width);