1 /* PSPP - A program for statistical analysis . -*-c-*-
3 Copyright (C) 2004 Free Software Foundation, Inc.
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.
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.
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., 51 Franklin Street, Fifth Floor, Boston, MA
24 #include <libpspp/hash.h>
26 struct weighted_value ;
28 /* The algorithm used to calculate percentiles */
40 extern const char *const ptile_alg_desc[];
47 /* The break point of the percentile */
50 /* The value of the percentile */
55 /* Calculate the percentiles of the break points in pc_bp,
56 placing the values in pc_val.
57 wv is a sorted array of weighted values of the data set.
59 void ptiles(struct hsh_table *pc_hash,
60 const struct weighted_value **wv,
63 enum pc_alg algorithm);
66 /* Calculate Tukey's Hinges and the Whiskers for the box plot*/
67 void tukey_hinges(const struct weighted_value **wv,
74 /* Hash utility functions */
75 int ptile_compare(const struct percentile *p1,
76 const struct percentile *p2,
79 unsigned ptile_hash(const struct percentile *p, void *aux);