1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2008 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/>. */
18 Create covariance matrices for procedures that need them.
21 #ifndef COVARIANCE_MATRIX_H
22 #define COVARIANCE_MATRIX_H
24 #include <math/design-matrix.h>
30 struct design_matrix *
31 covariance_matrix_create (size_t, const struct variable *[]);
33 void covariance_matrix_destroy (struct design_matrix *);
35 void covariance_pass_two (struct design_matrix *, double,
36 double, double, const struct variable *,
37 const struct variable *, const union value *, const union value *);
38 void covariance_accumulate (struct hsh_table *, struct moments1 **,
39 const struct ccase *, const struct variable **, size_t);
40 struct hsh_table * covariance_hsh_create (size_t);
41 struct design_matrix * covariance_accumulator_to_matrix (struct hsh_table *, const struct moments1 **,
42 const struct variable **, size_t, size_t);