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.misc;
025    
026    import org.ujmp.core.Matrix;
027    import org.ujmp.core.MatrixFactory;
028    import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation;
029    import org.ujmp.core.doublematrix.calculation.general.statistical.Max;
030    import org.ujmp.core.doublematrix.calculation.general.statistical.Min;
031    import org.ujmp.core.exceptions.MatrixException;
032    
033    public class Normalize extends AbstractDoubleCalculation {
034            private static final long serialVersionUID = -1898669824045141350L;
035    
036            private Matrix ret = null;
037    
038            public Normalize(int dimension, Matrix matrix) {
039                    super(dimension, matrix);
040            }
041    
042            public double getDouble(long... coordinates) throws MatrixException {
043                    if (ret == null) {
044                            Matrix max = new Max(getDimension(), getSource()).calcNew();
045                            Matrix min = new Min(getDimension(), getSource()).calcNew();
046                            Matrix range = max.minus(min);
047                            Matrix diff = null;
048                            switch (getDimension()) {
049                            case ROW:
050                                    diff = getSource().minus(MatrixFactory.vertCat(min, getSource().getRowCount()));
051                                    break;
052                            case COLUMN:
053                                    diff = getSource().minus(MatrixFactory.horCat(min, getSource().getColumnCount()));
054                                    break;
055                            default:
056                                    diff = getSource().minus(min);
057                                    break;
058                            }
059                            switch (getDimension()) {
060                            case ROW:
061                                    ret = diff.divide(MatrixFactory.vertCat(range, getSource().getRowCount()));
062                                    break;
063                            case COLUMN:
064                                    ret = diff.divide(MatrixFactory.horCat(range, getSource().getColumnCount()));
065                                    break;
066                            default:
067                                    ret = diff.divide(range);
068                                    break;
069                            }
070                    }
071    
072                    return ret.getAsDouble(coordinates);
073            }
074    
075    }