Here you can find the source of euclidean(double[] _a, double[] _b)
Computes the euclidean distance between two vector of doubles with equal size.
| Parameter | Description |
|---|---|
| _a | First vector |
| _b | Second vector |
public static double euclidean(double[] _a, double[] _b)
//package com.java2s; /*********************************************************************** This file is part of KEEL-software, the Data Mining tool for regression, classification, clustering, pattern mining and so on. Copyright (C) 2004-2010//ww w .j a v a 2s. co m F. Herrera (herrera@decsai.ugr.es) L. S?nchez (luciano@uniovi.es) J. Alcal?-Fdez (jalcala@decsai.ugr.es) S. Garc?a (sglopez@ujaen.es) A. Fern?ndez (alberto.fernandez@ujaen.es) J. Luengo (julianlm@decsai.ugr.es) This program is free software: you can redistribute it and/or modify it under the terms of the GNU 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/ **********************************************************************/ public class Main { /** * <p> * Computes the euclidean distance between two vector of doubles with equal size. * </p> * @param _a First vector * @param _b Second vector * @return A double that is the euclidean distance. */ public static double euclidean(double[] _a, double[] _b) { double toRet = 0; if (_a.length != _b.length) { System.out .println("ERROR: Euclidean can not be used if vectors have different size!"); toRet = -1; } else { for (int i = 0; i < _a.length; ++i) { toRet += (_a[i] - _b[i]) * (_a[i] - _b[i]); } toRet = Math.sqrt(toRet); } return toRet; } }