1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2008, 2009, 2011 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/>. */
19 #include "math/order-stats.h"
23 #include "data/casereader.h"
24 #include "data/val-type.h"
25 #include "data/variable.h"
26 #include "libpspp/assertion.h"
28 #include "gl/xalloc.h"
35 order_stats_dump_k1 (const struct order_stats *os)
37 struct k *k = &os->k[0];
38 printf ("K1: tc %g; c %g cc %g ccp %g\n",
39 k->tc, k->c, k->cc, k->cc_p1);
44 order_stats_dump_k2 (const struct order_stats *os)
46 struct k *k = &os->k[1];
47 printf ("K2: tc %g; c %g cc %g ccp %g\n",
48 k->tc, k->c, k->cc, k->cc_p1);
53 order_stats_dump (const struct order_stats *os)
55 order_stats_dump_k1 (os);
56 order_stats_dump_k2 (os);
62 update_k_lower (struct k *kk,
63 double y_i, double c_i, double cc_i)
75 update_k_upper (struct k *kk,
76 double y_i, double c_i, double cc_i)
78 if ( cc_i > kk->tc && kk->c_p1 == 0)
88 update_k_values (const struct ccase *cx, double y_i, double c_i, double cc_i,
89 struct order_stats **os, size_t n_os)
93 for (j = 0 ; j < n_os ; ++j)
96 struct order_stats *tos = os[j];
97 struct statistic *stat = &tos->parent;
98 for (k = 0 ; k < tos->n_k; ++k)
100 struct k *myk = &tos->k[k];
101 update_k_lower (myk, y_i, c_i, cc_i);
102 update_k_upper (myk, y_i, c_i, cc_i);
105 if ( stat->accumulate )
106 stat->accumulate (stat, cx, c_i, cc_i, y_i);
114 order_stats_accumulate_idx (struct order_stats **os, size_t nos,
115 struct casereader *reader,
120 struct ccase *prev_cx = NULL;
121 double prev_value = -DBL_MAX;
126 for (; (cx = casereader_read (reader)) != NULL; case_unref (cx))
128 const double weight = (wt_idx == -1) ? 1.0 : case_data_idx (cx, wt_idx)->f;
129 const double this_value = case_data_idx (cx, val_idx)->f;
131 /* The casereader MUST be sorted */
132 assert (this_value >= prev_value);
134 if ( prev_value == -DBL_MAX || prev_value == this_value)
137 if ( prev_value > -DBL_MAX && this_value > prev_value)
139 update_k_values (prev_cx, prev_value, c_i, cc_i, os, nos);
143 case_unref (prev_cx);
145 prev_value = this_value;
146 prev_cx = case_ref (cx);
149 update_k_values (prev_cx, prev_value, c_i, cc_i, os, nos);
150 case_unref (prev_cx);
152 casereader_destroy (reader);
157 order_stats_accumulate (struct order_stats **os, size_t nos,
158 struct casereader *reader,
159 const struct variable *wv,
160 const struct variable *var,
161 enum mv_class exclude)
163 /* Filter out missing cases */
164 reader = casereader_create_filter_missing (reader, &var, 1,
165 exclude, NULL, NULL);
167 order_stats_accumulate_idx (os, nos,
169 wv ? var_get_case_index (wv) : -1,
170 var_get_case_index (var));