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.core.doublematrix.calculation.entrywise.basic; 025 026 import org.ujmp.core.Coordinates; 027 import org.ujmp.core.Matrix; 028 import org.ujmp.core.MatrixFactory; 029 import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation; 030 import org.ujmp.core.exceptions.MatrixException; 031 032 public class Power extends AbstractDoubleCalculation { 033 private static final long serialVersionUID = -6766560469728046231L; 034 035 public Power(Matrix m1, Matrix m2) { 036 super(m1, m2); 037 if (m2.isScalar() && !Coordinates.equals(m1.getSize(), m2.getSize())) { 038 getSources()[1] = MatrixFactory.fill(m2.getAsDouble(0, 0), m1.getSize()); 039 } 040 } 041 042 public Power(Matrix m1, double v2) throws MatrixException { 043 this(m1, MatrixFactory.fill(v2, m1.getSize())); 044 } 045 046 public double getDouble(long... coordinates) throws MatrixException { 047 return Math.pow(getSource().getAsDouble(coordinates), getSources()[1] 048 .getAsDouble(coordinates)); 049 } 050 051 public static Matrix calc(Matrix source, Matrix power) throws MatrixException { 052 if (power.isScalar() && !Coordinates.equals(source.getSize(), power.getSize())) { 053 power = MatrixFactory.fill(power.getAsDouble(0, 0), source.getSize()); 054 } 055 Matrix ret = Matrix.factory.zeros(source.getSize()); 056 for (long[] c : source.availableCoordinates()) { 057 ret.setAsDouble(Math.pow(source.getAsDouble(c), power.getAsDouble(c)), c); 058 } 059 return ret; 060 } 061 062 public static Matrix calc(Matrix source, double power) throws MatrixException { 063 Matrix ret = Matrix.factory.zeros(source.getSize()); 064 for (long[] c : source.availableCoordinates()) { 065 ret.setAsDouble(Math.pow(source.getAsDouble(c), power), c); 066 } 067 return ret; 068 } 069 070 }