2 ///////////////////////////////////////////////////////////////////////////
3 // This program is free software: you can redistribute it and/or modify //
4 // it under the terms of the version 3 of the GNU General Public License //
5 // as published by the Free Software Foundation. //
7 // This program is distributed in the hope that it will be useful, but //
8 // WITHOUT ANY WARRANTY; without even the implied warranty of //
9 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU //
10 // General Public License for more details. //
12 // You should have received a copy of the GNU General Public License //
13 // along with this program. If not, see <http://www.gnu.org/licenses/>. //
15 // Written by Francois Fleuret, (C) IDIAP //
16 // Contact <francois.fleuret@idiap.ch> for comments & bug reports //
17 ///////////////////////////////////////////////////////////////////////////
21 Gaussian::Gaussian() {
27 void Gaussian::add_sample(scalar_t x) {
33 scalar_t Gaussian::expectation() {
34 return _sum / scalar_t(_nb_samples);
37 scalar_t Gaussian::variance() {
38 scalar_t e = _sum / scalar_t(_nb_samples);
39 return (_sum_sq - _sum * e) / scalar_t(_nb_samples - 1);
42 scalar_t Gaussian::standard_deviation() {
43 return sqrt(variance());