/*
* 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() };
}
}