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Commons Math example source code file (EuclideanIntegerPoint.java)

This example Commons Math source code file (EuclideanIntegerPoint.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Math tags/keywords

clusterable, collection, euclideanintegerpoint, euclideanintegerpoint, integer, io, object, object, override, override, serializable, string, stringbuffer, stringbuffer, util

The Commons Math EuclideanIntegerPoint.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.math.stat.clustering;

import java.io.Serializable;
import java.util.Collection;

import org.apache.commons.math.util.MathUtils;

/**
 * A simple implementation of {@link Clusterable} for points with integer coordinates.
 * @version $Revision: 925812 $ $Date: 2010-03-21 11:49:31 -0400 (Sun, 21 Mar 2010) $
 * @since 2.0
 */
public class EuclideanIntegerPoint implements Clusterable<EuclideanIntegerPoint>, Serializable {

    /** Serializable version identifier. */
    private static final long serialVersionUID = 3946024775784901369L;

    /** Point coordinates. */
    private final int[] point;

    /**
     * Build an instance wrapping an integer array.
     * <p>The wrapped array is referenced, it is not copied.

* @param point the n-dimensional point in integer space */ public EuclideanIntegerPoint(final int[] point) { this.point = point; } /** * Get the n-dimensional point in integer space. * @return a reference (not a copy!) to the wrapped array */ public int[] getPoint() { return point; } /** {@inheritDoc} */ public double distanceFrom(final EuclideanIntegerPoint p) { return MathUtils.distance(point, p.getPoint()); } /** {@inheritDoc} */ public EuclideanIntegerPoint centroidOf(final Collection<EuclideanIntegerPoint> points) { int[] centroid = new int[getPoint().length]; for (EuclideanIntegerPoint p : points) { for (int i = 0; i < centroid.length; i++) { centroid[i] += p.getPoint()[i]; } } for (int i = 0; i < centroid.length; i++) { centroid[i] /= points.size(); } return new EuclideanIntegerPoint(centroid); } /** {@inheritDoc} */ @Override public boolean equals(final Object other) { if (!(other instanceof EuclideanIntegerPoint)) { return false; } final int[] otherPoint = ((EuclideanIntegerPoint) other).getPoint(); if (point.length != otherPoint.length) { return false; } for (int i = 0; i < point.length; i++) { if (point[i] != otherPoint[i]) { return false; } } return true; } /** {@inheritDoc} */ @Override public int hashCode() { int hashCode = 0; for (Integer i : point) { hashCode += i.hashCode() * 13 + 7; } return hashCode; } /** * {@inheritDoc} * @since 2.1 */ @Override public String toString() { final StringBuffer buff = new StringBuffer("("); final int[] coordinates = getPoint(); for (int i = 0; i < coordinates.length; i++) { buff.append(coordinates[i]); if (i < coordinates.length - 1) { buff.append(","); } } buff.append(")"); return buff.toString(); } }

Other Commons Math examples (source code examples)

Here is a short list of links related to this Commons Math EuclideanIntegerPoint.java source code file:

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