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Diffstat (limited to 'src/de/lmu/ifi/dbs/elki/math/statistics/StudentDistribution.java')
| -rw-r--r-- | src/de/lmu/ifi/dbs/elki/math/statistics/StudentDistribution.java | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/src/de/lmu/ifi/dbs/elki/math/statistics/StudentDistribution.java b/src/de/lmu/ifi/dbs/elki/math/statistics/StudentDistribution.java deleted file mode 100644 index a8f45f9d..00000000 --- a/src/de/lmu/ifi/dbs/elki/math/statistics/StudentDistribution.java +++ /dev/null @@ -1,189 +0,0 @@ -package de.lmu.ifi.dbs.elki.math.statistics; - -/* - This file is part of ELKI: - Environment for Developing KDD-Applications Supported by Index-Structures - - Copyright (C) 2012 - Ludwig-Maximilians-Universität München - Lehr- und Forschungseinheit für Datenbanksysteme - ELKI Development Team - - This program is free software: you can redistribute it and/or modify - it under the terms of the GNU Affero General Public License as published by - the Free Software Foundation, either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU Affero General Public License for more details. - - You should have received a copy of the GNU Affero General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -import gnu.trove.map.TDoubleDoubleMap; -import gnu.trove.map.TIntObjectMap; -import gnu.trove.map.hash.TDoubleDoubleHashMap; -import gnu.trove.map.hash.TIntObjectHashMap; - -/** - * Tabelarizes the values for student distribution. - * - * @author Elke Achtert - */ -public class StudentDistribution { - /** - * Available alpha values. - */ - public static double _6000 = 0.6; - - /** - * Available alpha values. - */ - public static double _8000 = 0.8; - - /** - * Available alpha values. - */ - public static double _9000 = 0.9; - - /** - * Available alpha values. - */ - public static double _9500 = 0.95; - - /** - * Available alpha values. - */ - public static double _9750 = 0.975; - - /** - * Available alpha values. - */ - public static double _9900 = 0.99; - - /** - * Available alpha values. - */ - public static double _9950 = 0.995; - - /** - * Available alpha values. - */ - public static double _9990 = 0.999; - - /** - * Available alpha values. - */ - public static double _9995 = 0.9995; - - /** - * Available alpha values. - */ - public static double _4000 = 0.4; - - /** - * Available alpha values. - */ - public static double _2000 = 0.2; - - /** - * Available alpha values. - */ - public static double _1000 = 0.1; - - /** - * Available alpha values. - */ - public static double _0500 = 0.05; - - /** - * Available alpha values. - */ - public static double _0250 = 0.025; - - /** - * Available alpha values. - */ - public static double _0100 = 0.01; - - /** - * Available alpha values. - */ - public static double _0050 = 0.005; - - /** - * Available alpha values. - */ - public static double _0010 = 0.001; - - /** - * Available alpha values. - */ - public static double _0005 = 0.005; - - /** - * Holds the t-values. - */ - private static TIntObjectMap<TDoubleDoubleMap> tValues = new TIntObjectHashMap<TDoubleDoubleMap>(); - - static { - put(31, new double[] { 0.2533, 0.8416, 1.2816, 1.6449, 1.96, 2.3263, 2.5758, 3.0903, 3.2906 }); - } - - /** - * Returns the t-value for the given alpha-value and degree of freedom. - * - * @param alpha the alpha value - * @param n the degree of freedom - * @return the t-value for the given alpha-value and degree of freedom - */ - public static double tValue(double alpha, int n) { - if(n > 30) { - n = 31; - } - TDoubleDoubleMap map = tValues.get(n); - if(map == null) { - throw new IllegalArgumentException("t-values for n=" + n + " not yet tabularized!"); - } - - Double value = map.get(alpha); - if(value == null) { - throw new IllegalArgumentException("t-values for alpha=" + alpha + " not tabularized!"); - } - - return value; - } - - /** - * Stores the specified t-values for the given degree of freedom. - * - * @param n the degree of freedom - * @param values the t-values - */ - private static void put(int n, double[] values) { - TDoubleDoubleMap map = new TDoubleDoubleHashMap(); - map.put(_6000, values[0]); - map.put(_8000, values[1]); - map.put(_9000, values[2]); - map.put(_9500, values[3]); - map.put(_9750, values[4]); - map.put(_9900, values[5]); - map.put(_9950, values[6]); - map.put(_9990, values[7]); - map.put(_9995, values[8]); - - map.put(_4000, -values[0]); - map.put(_2000, -values[1]); - map.put(_1000, -values[2]); - map.put(_0500, -values[3]); - map.put(_0250, -values[4]); - map.put(_0100, -values[5]); - map.put(_0050, -values[6]); - map.put(_0010, -values[7]); - map.put(_0005, -values[8]); - tValues.put(n, map); - } -}
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