Here you can find the source of euclideanDistance(double[] coord1, double[] coord2)
| Parameter | Description |
|---|---|
| coord1 | First Coordinate |
| coord2 | Second Coordinate |
public static double euclideanDistance(double[] coord1, double[] coord2)
//package com.java2s; /**/*w w w . j a va 2s . com*/ * Copyright (C) 2014 Aniruddh Fichadia * * 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/>. * * If you use or enhance the code, please let me know using the provided author information or via * email Ani.Fichadia@gmail.com. */ public class Main { /** * Calculates the Euclidean distance between two coordinates. * * Coordinates are represented as an array where the value for each dimension is in each index * * @param coord1 First Coordinate * @param coord2 Second Coordinate * * @return Euclidean Distance between coord1 and coord2 */ public static double euclideanDistance(double[] coord1, double[] coord2) { return distanceBase(coord1, coord2, 2); } /** * Calculates the distance between two coordinates. Is used as a base function for * euclideanDistance(double[], double[]) and minkowskiDistance(double[], double[]) * * Coordinates are represented as an array where the value for each dimension is in each index * * @param coord1 First Coordinate * @param coord2 Second Coordinate * @param order Order for the distance calculation. Used to calculate the power of each * dimension and the n-th root for the final distance calculation * * @return Distance between coord1 and coord2 */ private static final double distanceBase(double[] coord1, double[] coord2, int order) { if (coord1.length != coord2.length) throw new IllegalArgumentException("Number of dimensions is not equal"); final int NUM_DIMENSIONS = coord1.length; double distance = 0; for (int d = 0; d < NUM_DIMENSIONS; d++) { double absDiff = Math.abs(coord2[d] - coord1[d]); distance += Math.pow(absDiff, order); } distance = Math.pow(distance, (1.0 / order)); ; return distance; } }