PLearn 0.1
SeparateInputVMatrix.cc
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00001 // -*- C++ -*-
00002 
00003 // SeparateInputVMatrix.cc
00004 //
00005 // Copyright (C) 2005 Hugo Larochelle
00006 //
00007 // Redistribution and use in source and binary forms, with or without
00008 // modification, are permitted provided that the following conditions are met:
00009 //
00010 //  1. Redistributions of source code must retain the above copyright
00011 //     notice, this list of conditions and the following disclaimer.
00012 //
00013 //  2. Redistributions in binary form must reproduce the above copyright
00014 //     notice, this list of conditions and the following disclaimer in the
00015 //     documentation and/or other materials provided with the distribution.
00016 //
00017 //  3. The name of the authors may not be used to endorse or promote
00018 //     products derived from this software without specific prior written
00019 //     permission.
00020 //
00021 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00022 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00023 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00024 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00025 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00026 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00027 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00028 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00029 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00030 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00031 //
00032 // This file is part of the PLearn library. For more information on the PLearn
00033 // library, go to the PLearn Web site at www.plearn.org
00034 
00035 /* *******************************************************
00036  * $Id: SeparateInputVMatrix.cc 8617 2008-03-03 17:45:54Z nouiz $
00037  ******************************************************* */
00038 
00039 // Authors: Hugo Larochelle
00040 
00044 #include "SeparateInputVMatrix.h"
00045 
00046 namespace PLearn {
00047 using namespace std;
00048 
00050 // SeparateInputVMatrix //
00052 SeparateInputVMatrix::SeparateInputVMatrix()
00053     : nsep(1)
00054 {
00055 
00056     // build_();
00057 }
00058 
00059 PLEARN_IMPLEMENT_OBJECT(SeparateInputVMatrix,
00060                         "Separates the input in nsep parts and  distributes them on different rows.",
00061                         "Also copies target and weight parts for each of these rows."
00062     );
00063 
00064 SeparateInputVMatrix::SeparateInputVMatrix(VMat the_source, int the_nsep)
00065     : inherited(the_source), nsep(the_nsep)
00066 {
00067     build_();
00068 }
00069 
00070 
00072 // declareOptions //
00074 void SeparateInputVMatrix::declareOptions(OptionList& ol)
00075 {
00076     declareOption(ol, "nsep", &SeparateInputVMatrix::nsep, OptionBase::buildoption,
00077                   "Number of separations of the input. The input size has to be\n"
00078                   "a multiple of that value.");
00079 
00080     inherited::declareOptions(ol);
00081 }
00082 
00084 // build //
00086 void SeparateInputVMatrix::build()
00087 {
00088     // ### Nothing to add here, simply calls build_
00089     inherited::build();
00090     build_();
00091 }
00092 
00094 // build_ //
00096 void SeparateInputVMatrix::build_()
00097 {
00098     if (source) {
00099         updateMtime(source);
00100         if(source->inputsize() % nsep != 0)
00101             PLERROR("In SeparateInputVMatrix::build_(): inputsize=%d of source vmat should be a multiple of nsep=%d",source->inputsize(),nsep);
00102         inputsize_ = source->inputsize()/nsep;
00103         targetsize_ = source->targetsize();
00104         weightsize_ = source->weightsize();
00105         //fieldinfos = source->fieldinfos;
00106         length_ = source.length() * nsep;
00107         width_ = inputsize_+targetsize_+weightsize_;
00108         sourcerow.resize(source->width());
00109     }
00110 }
00111 
00113 // getNewRow //
00115 void SeparateInputVMatrix::getNewRow(int i, const Vec& v) const
00116 {
00117     source->getRow(i/nsep,sourcerow);
00118     v.subVec(0,inputsize_) << sourcerow.subVec(i%nsep * inputsize_, inputsize_);
00119     v.subVec(inputsize_,targetsize_+weightsize_) <<
00120         sourcerow.subVec(source->inputsize(),targetsize_+weightsize_);
00121 }
00122 
00124 // makeDeepCopyFromShallowCopy //
00126 void SeparateInputVMatrix::makeDeepCopyFromShallowCopy(CopiesMap& copies)
00127 {
00128     inherited::makeDeepCopyFromShallowCopy(copies);
00129 
00130     // ### Call deepCopyField on all "pointer-like" fields
00131     // ### that you wish to be deepCopied rather than
00132     // ### shallow-copied.
00133     // ### ex:
00134     // deepCopyField(trainvec, copies);
00135 
00136     // ### Remove this line when you have fully implemented this method.
00137     //PLERROR("SeparateInputVMatrix::makeDeepCopyFromShallowCopy not fully (correctly) implemented yet!");
00138 }
00139 
00140 } // end of namespace PLearn
00141 
00142 
00143 /*
00144   Local Variables:
00145   mode:c++
00146   c-basic-offset:4
00147   c-file-style:"stroustrup"
00148   c-file-offsets:((innamespace . 0)(inline-open . 0))
00149   indent-tabs-mode:nil
00150   fill-column:79
00151   End:
00152 */
00153 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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