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 Cumprod extends AbstractDoubleCalculation { 032 private static final long serialVersionUID = -3784193604269223968L; 033 034 private Matrix cumprod = null; 035 036 private boolean ignoreNaN = true; 037 038 public Cumprod(Matrix m, boolean ignoreNaN) { 039 super(m); 040 this.ignoreNaN = ignoreNaN; 041 } 042 043 public double getDouble(long... coordinates) throws MatrixException { 044 if (cumprod == null) { 045 createMatrix(); 046 } 047 return cumprod.getAsDouble(coordinates); 048 } 049 050 private void createMatrix() { 051 Matrix source = getSource(); 052 Matrix m = Matrix.factory.zeros(source.getSize()); 053 for (long c = 0; c < source.getColumnCount(); c++) { 054 double prod = 1; 055 for (long r = 0; r < source.getRowCount(); r++) { 056 double v = source.getAsDouble(r, c); 057 if (ignoreNaN || !MathUtil.isNaNOrInfinite(v)) { 058 prod *= v; 059 } 060 m.setAsDouble(prod, r, c); 061 } 062 } 063 cumprod = m; 064 } 065 066 }