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
27 struct weighted_value ;
29 /* The algorithm used to calculate percentiles */
41 extern const char *ptile_alg_desc[];
48 /* The break point of the percentile */
51 /* The value of the percentile */
56 /* Calculate the percentiles of the break points in pc_bp,
57 placing the values in pc_val.
58 wv is a sorted array of weighted values of the data set.
60 void ptiles(struct hsh_table *pc_hash,
61 const struct weighted_value **wv,
64 enum pc_alg algorithm);
67 /* Calculate Tukey's Hinges and the Whiskers for the box plot*/
68 void tukey_hinges(const struct weighted_value **wv,
75 /* Hash utility functions */
76 int ptile_compare(const struct percentile *p1,
77 const struct percentile *p2,
80 unsigned ptile_hash(const struct percentile *p, void *aux);