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.intmatrix.calculation; 025 026 import org.ujmp.core.Matrix; 027 import org.ujmp.core.exceptions.MatrixException; 028 import org.ujmp.core.util.UJMPSettings; 029 030 public class DiscretizeStandardBinning extends AbstractIntCalculation { 031 private static final long serialVersionUID = -2045926868254834270L; 032 033 private Matrix min = null; 034 035 private Matrix max = null; 036 037 private int numberOfBins = 3; 038 039 public DiscretizeStandardBinning(int dimension, Matrix matrix, int numberOfBins) { 040 super(dimension, matrix); 041 this.numberOfBins = numberOfBins; 042 } 043 044 public int getInt(long... coordinates) throws MatrixException { 045 if (min == null || max == null) { 046 calculate(); 047 } 048 double v = getSource().getAsDouble(coordinates); 049 double mi = 0; 050 double ma = 0; 051 052 switch (getDimension()) { 053 case Matrix.ROW: 054 mi = min.getAsDouble(0, coordinates[COLUMN]); 055 ma = max.getAsDouble(0, coordinates[COLUMN]) + UJMPSettings.getTolerance(); 056 break; 057 case Matrix.COLUMN: 058 mi = min.getAsDouble(coordinates[ROW], 0); 059 ma = max.getAsDouble(coordinates[ROW], 0) + UJMPSettings.getTolerance(); 060 break; 061 default: 062 mi = min.getAsDouble(0, 0); 063 ma = max.getAsDouble(0, 0) + UJMPSettings.getTolerance(); 064 break; 065 } 066 067 double bs = (ma - mi) / numberOfBins; 068 int i = (int) Math.floor((v - mi) / bs); 069 return i; 070 } 071 072 private void calculate() { 073 min = getSource().min(Ret.NEW, getDimension()); 074 max = getSource().max(Ret.NEW, getDimension()); 075 } 076 077 }