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.general.statistical; 025 026 import org.ujmp.core.Matrix; 027 import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation; 028 import org.ujmp.core.exceptions.MatrixException; 029 import org.ujmp.core.util.MathUtil; 030 031 public class Diff extends AbstractDoubleCalculation { 032 private static final long serialVersionUID = 7565251430714359410L; 033 034 private boolean ignoreNaN = true; 035 036 public Diff(int dimension, boolean ignoreNaN, Matrix source) { 037 super(dimension, source); 038 this.ignoreNaN = ignoreNaN; 039 } 040 041 042 public double getDouble(long... coordinates) throws MatrixException { 043 double v1 = 0.0; 044 double v2 = 0.0; 045 switch (getDimension()) { 046 case ROW: 047 v1 = getSource().getAsDouble(coordinates[ROW], coordinates[COLUMN]); 048 v2 = getSource().getAsDouble(coordinates[ROW] + 1, coordinates[COLUMN]); 049 break; 050 case COLUMN: 051 v1 = getSource().getAsDouble(coordinates[ROW], coordinates[COLUMN]); 052 v2 = getSource().getAsDouble(coordinates[ROW], coordinates[COLUMN] + 1); 053 break; 054 default: 055 throw new MatrixException("not possible for this dimension"); 056 } 057 if (ignoreNaN && (MathUtil.isNaNOrInfinite(v1) || MathUtil.isNaNOrInfinite(v2))) { 058 return 0.0; 059 } else { 060 return v2 - v1; 061 } 062 } 063 064 public long[] getSize() { 065 switch (getDimension()) { 066 case ROW: 067 return new long[] { getSource().getRowCount() - 1, getSource().getColumnCount() }; 068 case COLUMN: 069 return new long[] { getSource().getRowCount(), getSource().getColumnCount() - 1 }; 070 default: 071 throw new MatrixException("not possible for this dimension"); 072 } 073 } 074 075 }