org.ujmp.commonsmath.PairedTTest.java Source code

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Here is the source code for org.ujmp.commonsmath.PairedTTest.java

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/*
 * Copyright (C) 2008-2015 by Holger Arndt
 *
 * This file is part of the Universal Java Matrix Package (UJMP).
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership and licensing.
 *
 * UJMP is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * UJMP 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with UJMP; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA  02110-1301  USA
 */

package org.ujmp.commonsmath;

import org.apache.commons.math3.stat.inference.TestUtils;
import org.ujmp.core.Matrix;
import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation;

public class PairedTTest extends AbstractDoubleCalculation {
    private static final long serialVersionUID = 9074733842439986005L;

    public PairedTTest(Matrix matrix) {
        super(matrix);
    }

    public double getDouble(long... coordinates) {
        try {
            long var1 = coordinates[ROW];
            long var2 = coordinates[COLUMN];
            double[] sample1 = new double[(int) getSource().getRowCount()];
            double[] sample2 = new double[(int) getSource().getRowCount()];
            for (int r = 0; r < getSource().getRowCount(); r++) {
                sample1[r] = getSource().getAsDouble(r, var1);
                sample2[r] = getSource().getAsDouble(r, var2);
            }
            double pValue = TestUtils.pairedTTest(sample1, sample2);
            return pValue;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    public long[] getSize() {
        return new long[] { getSource().getColumnCount(), getSource().getColumnCount() };
    }

}