PLearn 0.1
ClassSubsetVMatrix.h
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00001 // -*- C++ -*-
00002 
00003 // ClassSubsetVMatrix.h
00004 //
00005 // Copyright (C) 2004 Olivier Delalleau
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: ClassSubsetVMatrix.h 3760 2005-07-11 17:27:18Z tihocan $
00037    ******************************************************* */
00038 
00039 // Authors: Hugo Larochelle
00040 
00044 #ifndef ClassSubsetVMatrix_INC
00045 #define ClassSubsetVMatrix_INC
00046 
00047 #include "SelectRowsVMatrix.h"
00048 
00049 namespace PLearn {
00050 using namespace std;
00051 
00052 class ClassSubsetVMatrix: public SelectRowsVMatrix
00053 {
00054 
00055 private:
00056 
00057   typedef SelectRowsVMatrix inherited;
00058 
00059   Vec input,target;
00060   real weight;
00061 protected:
00062 
00063   // *********************
00064   // * protected options *
00065   // *********************
00066 
00067 public:
00068 
00069   // ************************
00070   // * public build options *
00071   // ************************
00072 
00074   TVec<int> classes;
00075 
00079   bool redistribute_classes;
00080 
00083   bool one_vs_minus_one_classification;
00084 
00085   // ****************
00086   // * Constructors *
00087   // ****************
00088 
00090   ClassSubsetVMatrix();
00091 
00095   ClassSubsetVMatrix(VMat the_source, const TVec<int>& the_classes,
00096                      bool call_build_ = true);
00097 
00099   ClassSubsetVMatrix(VMat the_source, int the_class, bool call_build_ = true);
00100 
00101   // ******************
00102   // * Object methods *
00103   // ******************
00104 
00105 private:
00106 
00108   void build_();
00109 
00110 protected:
00111 
00113   static void declareOptions(OptionList& ol);
00114 
00115 public:
00116 
00117   // Simply calls inherited::build() then build_().
00118   virtual void build();
00119 
00120   virtual real get(int i, int j) const;
00121   virtual void getSubRow(int i, int j, Vec v) const;
00122 
00123 
00125   virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies);
00126 
00128   PLEARN_DECLARE_OBJECT(ClassSubsetVMatrix);
00129 
00130 };
00131 
00132 DECLARE_OBJECT_PTR(ClassSubsetVMatrix);
00133 
00134 } // end of namespace PLearn
00135 
00136 #endif
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