001 /* 002 * Copyright (C) 2008-2010 by Holger Arndt 003 * 004 * This file is part of the Universal Java Matrix Package (UJMP). 005 * See the NOTICE file distributed with this work for additional 006 * information regarding copyright ownership and licensing. 007 * 008 * UJMP is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation; either version 2 011 * of the License, or (at your option) any later version. 012 * 013 * UJMP is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public 019 * License along with UJMP; if not, write to the 020 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 021 * Boston, MA 02110-1301 USA 022 */ 023 024 package org.ujmp.ojalgo.calculation; 025 026 import org.ojalgo.matrix.decomposition.Eigenvalue; 027 import org.ojalgo.matrix.decomposition.EigenvalueDecomposition; 028 import org.ojalgo.matrix.store.PrimitiveDenseStore; 029 import org.ujmp.core.Matrix; 030 import org.ujmp.ojalgo.OjalgoDenseDoubleMatrix2D; 031 032 public class Eig 033 implements 034 org.ujmp.core.doublematrix.calculation.general.decomposition.Eig<Matrix> { 035 036 public static Eig INSTANCE = new Eig(); 037 038 public Matrix[] calc(Matrix source) { 039 final Eigenvalue<Double> evd = EigenvalueDecomposition.makePrimitive(); 040 PrimitiveDenseStore matrix = null; 041 if (source instanceof OjalgoDenseDoubleMatrix2D) { 042 matrix = ((OjalgoDenseDoubleMatrix2D) source).getWrappedObject(); 043 } else { 044 matrix = new OjalgoDenseDoubleMatrix2D(source).getWrappedObject(); 045 } 046 evd.compute(matrix); 047 final Matrix v = new OjalgoDenseDoubleMatrix2D(evd.getV()); 048 final Matrix d = new OjalgoDenseDoubleMatrix2D(evd.getD()); 049 return new Matrix[] { v, d }; 050 } 051 }