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.learner.init;
031
032import gov.sandia.cognition.math.matrix.Matrix;
033
034import java.io.File;
035import java.io.IOException;
036import java.util.Map;
037
038import org.openimaj.math.matrix.CFMatrixUtils;
039
040import com.jmatio.io.MatFileReader;
041import com.jmatio.types.MLArray;
042
043/**
044 * Given a matlab file, return its matrix held in the "arr" field as the initialisation matrix
045 * @author Sina Samangooei (ss@ecs.soton.ac.uk)
046 *
047 */
048public class MatlabFileInitStrat implements InitStrategy{
049
050        private Matrix data;
051
052        /**
053         * @param matfile the file from which to read
054         * @throws IOException
055         */
056        public MatlabFileInitStrat(File matfile) throws IOException {
057                MatFileReader reader = new MatFileReader(matfile);
058                Map<String, MLArray> content = reader.getContent();
059                this.data= CFMatrixUtils.asMat(content.get("arr"));
060        }
061
062        @Override
063        public Matrix init(int rows, int cols) {
064                return data;
065        }
066
067
068}