PLearn 0.1
CrossReferenceVMatrix.cc
Go to the documentation of this file.
00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 1999-2001 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
00006 // Copyright (C) 2002 Pascal Vincent, Julien Keable, Xavier Saint-Mleux
00007 //
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions are met:
00010 //
00011 //  1. Redistributions of source code must retain the above copyright
00012 //     notice, this list of conditions and the following disclaimer.
00013 //
00014 //  2. Redistributions in binary form must reproduce the above copyright
00015 //     notice, this list of conditions and the following disclaimer in the
00016 //     documentation and/or other materials provided with the distribution.
00017 //
00018 //  3. The name of the authors may not be used to endorse or promote
00019 //     products derived from this software without specific prior written
00020 //     permission.
00021 //
00022 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00023 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00024 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00025 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00026 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00027 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00028 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00029 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00030 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00031 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 //
00033 // This file is part of the PLearn library. For more information on the PLearn
00034 // library, go to the PLearn Web site at www.plearn.org
00035 
00036 
00037 /* *******************************************************
00038  * $Id: CrossReferenceVMatrix.cc 8617 2008-03-03 17:45:54Z nouiz $
00039  ******************************************************* */
00040 
00041 #include "CrossReferenceVMatrix.h"
00042 
00043 namespace PLearn {
00044 using namespace std;
00045 
00046 
00049 PLEARN_IMPLEMENT_OBJECT(CrossReferenceVMatrix, "ONE LINE DESC", "ONE LINE HELP");
00050 
00051 CrossReferenceVMatrix::CrossReferenceVMatrix()
00052     : index(0)
00053 {
00054 }
00055 
00056 CrossReferenceVMatrix::CrossReferenceVMatrix(VMat the_master,
00057                                              int the_index,
00058                                              VMat the_slave)
00059     : inherited(the_master.length(), the_master.width()+the_slave.width()-1),
00060       master(the_master),
00061       index(the_index),
00062       slave(the_slave)
00063 {
00064     //fieldinfos = the_master->getFieldInfos();
00065     // fieldinfos &= the_slave->getFieldInfos();
00066     build();
00067 }
00068 
00069 
00070 void
00071 CrossReferenceVMatrix::declareOptions(OptionList &ol)
00072 {
00073     declareOption(ol, "master", &CrossReferenceVMatrix::master,
00074                   OptionBase::buildoption, "");
00075 
00076     declareOption(ol, "slave", &CrossReferenceVMatrix::slave,
00077                   OptionBase::buildoption, "");
00078 
00079     declareOption(ol, "index", &CrossReferenceVMatrix::index,
00080                   OptionBase::buildoption, "");
00081 
00082     inherited::declareOptions(ol);
00083 }
00084 
00085 void
00086 CrossReferenceVMatrix::build()
00087 {
00088     inherited::build();
00089     build_();
00090 }
00091 
00092 void
00093 CrossReferenceVMatrix::build_()
00094 {
00095     if (master && slave) {
00096         fieldinfos = master->getFieldInfos();
00097         fieldinfos &= slave->getFieldInfos();
00098         updateMtime(master);
00099         updateMtime(slave);
00100     }
00101 }
00102 
00103 void CrossReferenceVMatrix::getRow(int i, Vec samplevec) const
00104 {
00105 #ifdef BOUNDCHECK
00106     if (i<0 || i>=length() || samplevec.length()!=width())
00107         PLERROR("In CrossReferenceVMatrix::getRow OUT OF BOUNDS");
00108 #endif
00109 
00110     Vec v1(master.width());
00111     Vec v2(slave.width());
00112     master->getRow(i, v1);
00113     int index = (int)v1[index];
00114     slave->getRow(index, v2);
00115 
00116     for (int j=0; j<index; j++) samplevec[j] = v1[j];
00117     for (int j=index+1; j<v1.length(); j++) samplevec[j-1] = v1[j];
00118     for (int j=0; j<v2.length(); j++) samplevec[j+v1.length()-1] = v2[j];
00119 }
00120 
00121 real CrossReferenceVMatrix::get(int i, int j) const
00122 {
00123 #ifdef BOUNDCHECK
00124     if(i<0 || i>=length() || j<0 || j>=width())
00125         PLERROR("In CrossReferenceVMatrix::get OUT OF BOUNDS");
00126 #endif
00127 
00128     if (j < index)
00129         return master->get(i,j);
00130     else if (j < master.width()-1)
00131         return master->get(i,j+1);
00132     else {
00133         int ii = (int)master->get(i,index);
00134         int jj = j - master.width() + 1;
00135         return slave->get(ii,jj);
00136     }
00137 }
00138 
00139 } // end of namespace PLearn
00140 
00141 
00142 /*
00143   Local Variables:
00144   mode:c++
00145   c-basic-offset:4
00146   c-file-style:"stroustrup"
00147   c-file-offsets:((innamespace . 0)(inline-open . 0))
00148   indent-tabs-mode:nil
00149   fill-column:79
00150   End:
00151 */
00152 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines