UnitLowerTriangDenseMatrixTest.java

/*
 * Copyright (C) 2003-2006 Bjørn-Ove Heimsund
 *
 * This file is part of MTJ.
 *
 * This library 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 2.1 of the License, or (at your
 * option) any later version.
 *
 * This library 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 this library; if not, write to the Free Software Foundation,
 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

package no.uib.cipr.matrix;

import org.junit.Test;

/**
 * Test of UnitLowerTriangDenseMatrix
 */
public class UnitLowerTriangDenseMatrixTest
        extends
            UnitTriangMatrixTestAbstract {

    @Override
    protected void createPrimary() throws Exception {
        int n = Utilities.getInt(1, max);
        A = new UnitLowerTriangDenseMatrix(n);
        Ad = Utilities.unitLowerPopulate(A);
        Utilities.unitSet(Ad);
    }

    @Test
    public void testMultUpper() {
        Matrix lu = new DenseMatrix(new double[][]{{-4.00, 6.00, 3.00},
                {1.00, -8.00, 5.00}, {-0.50, -0.25, 0.75}});
        Matrix l = new UnitLowerTriangDenseMatrix(lu, false);
        Matrix u = new UpperTriangDenseMatrix(lu, false);

        Matrix e = new DenseMatrix(new double[][]{{-4, 6, 3}, {-4, -2, 8},
                {2, -1, -2}});

        Matrix out = l.mult(u, new DenseMatrix(3, 3));
        MatrixTestAbstract.assertMatrixEquals(e, out);
    }

}