001/** 002 * Copyright (c) 2011, The University of Southampton and the individual contributors. 003 * All rights reserved. 004 * 005 * Redistribution and use in source and binary forms, with or without modification, 006 * are permitted provided that the following conditions are met: 007 * 008 * * Redistributions of source code must retain the above copyright notice, 009 * this list of conditions and the following disclaimer. 010 * 011 * * Redistributions in binary form must reproduce the above copyright notice, 012 * this list of conditions and the following disclaimer in the documentation 013 * and/or other materials provided with the distribution. 014 * 015 * * Neither the name of the University of Southampton nor the names of its 016 * contributors may be used to endorse or promote products derived from this 017 * software without specific prior written permission. 018 * 019 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 020 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 021 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 022 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR 023 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 024 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 025 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 026 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 028 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 029 */ 030package org.openimaj.ml.linear.data; 031 032import gov.sandia.cognition.math.matrix.Matrix; 033import java.io.File; 034import java.io.IOException; 035import java.util.Map; 036 037import org.openimaj.math.matrix.CFMatrixUtils; 038import org.openimaj.util.pair.Pair; 039 040import com.jmatio.io.MatFileReader; 041import com.jmatio.types.MLArray; 042import com.jmatio.types.MLCell; 043 044public class MatlabFileDataGenerator implements MatrixDataGenerator<Matrix>{ 045 private MLCell data; 046 private int index; 047 048 public MatlabFileDataGenerator(File matfile) throws IOException { 049 MatFileReader reader = new MatFileReader(matfile); 050 Map<String, MLArray> content = reader.getContent(); 051 this.data= (MLCell) content.get("XYs"); 052 this.index = 0; 053 } 054 055 @Override 056 public Pair<Matrix> generate() { 057 if(index>=this.data.getM())return null; 058 Pair<Matrix> XY = new Pair<Matrix>( 059 CFMatrixUtils.asMat(this.data.get(index, 0)), 060 CFMatrixUtils.asMat(this.data.get(index, 1)) 061 ); 062 index++; 063 return XY; 064 } 065 066 067 068 public int size() { 069 return this.data.getM(); 070 } 071 072}