org.jpmml.evaluator.NormalDistributionUtil.java Source code

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Here is the source code for org.jpmml.evaluator.NormalDistributionUtil.java

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/*
 * Copyright (c) 2014 Villu Ruusmann
 *
 * This file is part of JPMML-Evaluator
 *
 * JPMML-Evaluator is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JPMML-Evaluator 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with JPMML-Evaluator.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.jpmml.evaluator;

import org.apache.commons.math3.distribution.NormalDistribution;

public class NormalDistributionUtil {

    private NormalDistributionUtil() {
    }

    static public double probability(double x) {
        return NormalDistributionUtil.normalDistribution.density(x);
    }

    static public double probability(double mean, double stdev, double x) {
        NormalDistribution normalDistribution = new NormalDistribution(mean, stdev);

        return normalDistribution.density(x);
    }

    static public double cumulativeProbability(double x) {
        return NormalDistributionUtil.normalDistribution.cumulativeProbability(x);
    }

    private static final NormalDistribution normalDistribution = new NormalDistribution();
}