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.doublematrix.calculation.AbstractDoubleCalculation; 028 import org.ujmp.core.doublematrix.calculation.general.statistical.Std; 029 import org.ujmp.core.exceptions.MatrixException; 030 031 public class Standardize extends AbstractDoubleCalculation { 032 private static final long serialVersionUID = 6454174968175712888L; 033 034 private Matrix center = null; 035 036 private Matrix sigma = null; 037 038 public Standardize(int dimension, Matrix matrix) { 039 super(dimension, matrix); 040 } 041 042 public double getDouble(long... coordinates) throws MatrixException { 043 if (center == null) { 044 center = new Center(true, getDimension(), getSource()).calcNew(); 045 } 046 if (sigma == null) { 047 sigma = new Std(getDimension(), true, center).calcNew(); 048 } 049 switch (getDimension()) { 050 case ALL: 051 return center.getAsDouble(coordinates) / sigma.getAsDouble(0, 0); 052 case ROW: 053 return center.getAsDouble(coordinates) / sigma.getAsDouble(0, coordinates[COLUMN]); 054 case COLUMN: 055 return center.getAsDouble(coordinates) / sigma.getAsDouble(coordinates[ROW], 0); 056 } 057 return Double.NaN; 058 } 059 060 }