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Java example source code file (WeightedEvaluation.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

mathillegalargumentexception, weightedevaluation

The WeightedEvaluation.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.stat.descriptive;

import org.apache.commons.math3.exception.MathIllegalArgumentException;

/**
 * Weighted evaluation for statistics.
 *
 * @since 2.1
 */
public interface WeightedEvaluation {

    /**
     * Returns the result of evaluating the statistic over the input array,
     * using the supplied weights.
     *
     * @param values input array
     * @param weights array of weights
     * @return the value of the weighted statistic applied to the input array
     * @throws MathIllegalArgumentException if either array is null, lengths
     * do not match, weights contain NaN, negative or infinite values, or
     * weights does not include at least on positive value
     */
    double evaluate(double[] values, double[] weights) throws MathIllegalArgumentException;

    /**
     * Returns the result of evaluating the statistic over the specified entries
     * in the input array, using corresponding entries in the supplied weights array.
     *
     * @param values the input array
     * @param weights array of weights
     * @param begin the index of the first element to include
     * @param length the number of elements to include
     * @return the value of the weighted statistic applied to the included array entries
     * @throws MathIllegalArgumentException if either array is null, lengths
     * do not match, indices are invalid, weights contain NaN, negative or
     * infinite values, or weights does not include at least on positive value
     */
    double evaluate(double[] values, double[] weights, int begin, int length)
    throws MathIllegalArgumentException;

}

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