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Java example source code file (CanberraDistance.java)
The CanberraDistance.java Java example 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.math3.ml.distance; import org.apache.commons.math3.exception.DimensionMismatchException; import org.apache.commons.math3.util.FastMath; import org.apache.commons.math3.util.MathArrays; /** * Calculates the Canberra distance between two points. * * @since 3.2 */ public class CanberraDistance implements DistanceMeasure { /** Serializable version identifier. */ private static final long serialVersionUID = -6972277381587032228L; /** {@inheritDoc} */ public double compute(double[] a, double[] b) throws DimensionMismatchException { MathArrays.checkEqualLength(a, b); double sum = 0; for (int i = 0; i < a.length; i++) { final double num = FastMath.abs(a[i] - b[i]); final double denom = FastMath.abs(a[i]) + FastMath.abs(b[i]); sum += num == 0.0 && denom == 0.0 ? 0.0 : num / denom; } return sum; } } Other Java examples (source code examples)Here is a short list of links related to this Java CanberraDistance.java source code file: |
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