1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2009, 2010, 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/>. */
21 #include <gsl/gsl_matrix.h>
23 #include "data/missing-values.h"
30 struct covariance * covariance_1pass_create (size_t n_vars, const struct variable *const *vars,
31 const struct variable *wv, enum mv_class excl);
34 covariance_2pass_create (size_t n_vars, const struct variable *const *vars,
35 struct categoricals *cats,
36 const struct variable *wv, enum mv_class excl);
38 void covariance_accumulate (struct covariance *, const struct ccase *);
39 void covariance_accumulate_pass1 (struct covariance *, const struct ccase *);
40 void covariance_accumulate_pass2 (struct covariance *, const struct ccase *);
42 gsl_matrix * covariance_calculate (struct covariance *);
43 gsl_matrix * covariance_calculate_unnormalized (struct covariance *);
45 void covariance_destroy (struct covariance *cov);
47 const gsl_matrix *covariance_moments (const struct covariance *cov, int m);
49 const struct categoricals * covariance_get_categoricals (const struct covariance *cov);
50 size_t covariance_dim (const struct covariance * cov);
54 covariance_dump_enc (const struct covariance *cov, const struct ccase *c,
58 covariance_dump_enc_header (const struct covariance *cov, int length);