ilutest.java

另一个功能更强大的矩阵运算软件开源代码

/*
 * 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.sparse;

import no.uib.cipr.matrix.Matrix;
import no.uib.cipr.matrix.Vector;
import no.uib.cipr.matrix.sparse.CompRowMatrix;
import no.uib.cipr.matrix.sparse.ILU;

/**
 * Test of ILU(0)
 */
public class ILUTest extends IncompleteFactorizationTestAbstract {

    @Override
    void testFactorization(Matrix A, Vector x) {
        Vector b = A.mult(x, x.copy());

        ILU ilu = new ILU(new CompRowMatrix(A));
        ilu.setMatrix(A);
        ilu.apply(b, x);

        Vector r = A.multAdd(-1, x, b.copy());

        assertEquals(0, r.norm(Vector.Norm.TwoRobust), 1e-5);
    }
}