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.creators; 025 026 import java.util.Arrays; 027 028 import org.ujmp.core.Coordinates; 029 import org.ujmp.core.Matrix; 030 import org.ujmp.core.MatrixFactory; 031 import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation; 032 import org.ujmp.core.enums.ValueType; 033 import org.ujmp.core.exceptions.MatrixException; 034 035 public class Eye extends AbstractDoubleCalculation { 036 private static final long serialVersionUID = 2547827499345834225L; 037 038 public Eye(Matrix matrix) { 039 super(matrix); 040 } 041 042 public double getDouble(long... coordinates) { 043 return coordinates[ROW] == coordinates[COLUMN] ? 1.0 : 0.0; 044 } 045 046 public static Matrix calc(Matrix source) throws MatrixException { 047 Matrix ret = Matrix.factory.zeros(source.getSize()); 048 long[] c = Coordinates.copyOf(source.getSize()); 049 for (int i = 0; Coordinates.isSmallerThan(c, source.getSize()); i++) { 050 Arrays.fill(c, i); 051 ret.setAsDouble(1.0, c); 052 } 053 return ret; 054 } 055 056 public static Matrix calcOrig(Matrix source) throws MatrixException { 057 long[] c = new long[source.getSize().length]; 058 for (int i = 0; Coordinates.isSmallerThan(c, source.getSize()); i++) { 059 source.setAsDouble(1.0, c); 060 Arrays.fill(c, i + 1); 061 } 062 return source; 063 } 064 065 public static Matrix calc(long... size) throws MatrixException { 066 return calc(ValueType.DOUBLE, size); 067 } 068 069 public static Matrix calc(ValueType valueType, long... size) throws MatrixException { 070 Matrix ret = MatrixFactory.zeros(valueType, size); 071 long[] c = new long[size.length]; 072 for (int i = 0; Coordinates.isSmallerThan(c, size); i++) { 073 ret.setAsDouble(1.0, c); 074 Arrays.fill(c, i + 1); 075 } 076 return ret; 077 } 078 }