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Java example source code file (StatisticalSummary.java)

This example Java source code file (StatisticalSummary.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

statisticalsummary

The StatisticalSummary.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;

/**
 *  Reporting interface for basic univariate statistics.
 *
 */
public interface StatisticalSummary {

    /**
     * Returns the <a href="http://www.xycoon.com/arithmetic_mean.htm">
     * arithmetic mean </a> of the available values
     * @return The mean or Double.NaN if no values have been added.
     */
    double getMean();
    /**
     * Returns the variance of the available values.
     * @return The variance, Double.NaN if no values have been added
     * or 0.0 for a single value set.
     */
    double getVariance();
    /**
     * Returns the standard deviation of the available values.
     * @return The standard deviation, Double.NaN if no values have been added
     * or 0.0 for a single value set.
     */
    double getStandardDeviation();
    /**
     * Returns the maximum of the available values
     * @return The max or Double.NaN if no values have been added.
     */
    double getMax();
    /**
    * Returns the minimum of the available values
    * @return The min or Double.NaN if no values have been added.
    */
    double getMin();
    /**
     * Returns the number of available values
     * @return The number of available values
     */
    long getN();
    /**
     * Returns the sum of the values that have been added to Univariate.
     * @return The sum or Double.NaN if no values have been added
     */
    double getSum();

}

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