2 * folded-ctf is an implementation of the folded hierarchy of
3 * classifiers for object detection, developed by Francois Fleuret
6 * Copyright (c) 2008 Idiap Research Institute, http://www.idiap.ch/
7 * Written by Francois Fleuret <francois.fleuret@idiap.ch>
9 * This file is part of folded-ctf.
11 * folded-ctf is free software: you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 3 as
13 * published by the Free Software Foundation.
15 * folded-ctf is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with folded-ctf. If not, see <http://www.gnu.org/licenses/>.
27 Gaussian::Gaussian() {
33 void Gaussian::add_sample(scalar_t x) {
39 scalar_t Gaussian::expectation() {
40 return _sum / scalar_t(_nb_samples);
43 scalar_t Gaussian::variance() {
44 scalar_t e = _sum / scalar_t(_nb_samples);
45 return (_sum_sq - _sum * e) / scalar_t(_nb_samples - 1);
48 scalar_t Gaussian::standard_deviation() {
49 return sqrt(variance());