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>
25 #include <math/interaction.h>
30 struct covariance_matrix;
37 How to deal with missing values.
43 struct design_matrix *covariance_matrix_create (size_t, const struct variable *[]);
45 void covariance_matrix_destroy (struct covariance_matrix *);
46 void covariance_pass_two (struct design_matrix *, double,
47 double, double, const struct variable *,
48 const struct variable *, const union value *,
50 void covariance_matrix_compute (struct covariance_matrix *);
51 struct covariance_matrix *covariance_matrix_init (size_t,
52 const struct variable *[],
53 int, int, enum mv_class);
54 void covariance_matrix_free (struct covariance_matrix *);
55 void covariance_matrix_accumulate (struct covariance_matrix *,
56 const struct ccase *, void **, size_t);
57 struct design_matrix *covariance_to_design (const struct covariance_matrix *);
58 double covariance_matrix_get_element (const struct covariance_matrix *, size_t, size_t);
59 void covariance_interaction_set (struct covariance_matrix *,
60 const struct interaction_variable **, size_t);