/*
* Copyright (c) 2009-2012, Peter Abeles. All Rights Reserved.
*
* This file is part of Efficient Java Matrix Library (EJML).
*
* EJML 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 3
* of the License, or (at your option) any later version.
*
* EJML 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 EJML. If not, see <http://www.gnu.org/licenses/>.
*/
package org.ejml.example;
import org.ejml.data.DenseMatrix64F;
import org.ejml.ops.CommonOps;
import org.ejml.ops.MatrixFeatures;
import org.ejml.ops.RandomMatrices;
import org.junit.Test;
import java.util.Random;
import static org.junit.Assert.assertTrue;
/**
* @author Peter Abeles
*/
public class TestQRExampleOps {
Random rand = new Random(23423);
@Test
public void basic() {
checkMatrix(7,5);
checkMatrix(5,5);
checkMatrix(7,7);
}
private void checkMatrix( int numRows , int numCols ) {
DenseMatrix64F A = RandomMatrices.createRandom(numRows,numCols,-1,1,rand);
QRExampleOps alg = new QRExampleOps();
alg.decompose(A);
DenseMatrix64F Q = alg.getQ();
DenseMatrix64F R = alg.getR();
DenseMatrix64F A_found = new DenseMatrix64F(numRows,numCols);
CommonOps.mult(Q,R,A_found);
assertTrue( MatrixFeatures.isIdentical(A,A_found,1e-8));
}
}