PLearn 0.1
RemapLastColumnVMatrix.h
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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: RemapLastColumnVMatrix.h 8239 2007-11-09 15:35:34Z nouiz $
00039  ******************************************************* */
00040 
00041 
00044 #ifndef RemapLastColumnVMatrix_INC
00045 #define RemapLastColumnVMatrix_INC
00046 
00047 #include "SourceVMatrix.h"
00048 #include "VMat.h"
00049 
00050 namespace PLearn {
00051 using namespace std;
00052 
00053 class RemapLastColumnVMatrix: public SourceVMatrix
00054 {
00055     typedef SourceVMatrix inherited;
00056 
00057 protected:
00058     // DEPRECATED - use 'source' instead
00059     // VMat underlying_distr;
00060 
00062     Mat mapping;
00063 
00069     real if_equals_val;
00070     real then_val;
00071     real else_val;
00072 
00073 public:
00074     // ******************
00075     // *  Constructors  *
00076     // ******************
00077 
00079     RemapLastColumnVMatrix(bool call_build_=false);
00080 
00083     RemapLastColumnVMatrix(VMat the_source, Mat the_mapping,
00084                            bool call_build_=false);
00085 
00088     RemapLastColumnVMatrix(VMat the_source,
00089                            real if_equals_value,
00090                            real then_value=+1,
00091                            real else_value=-1,
00092                            bool call_build_=false);
00093 
00094     PLEARN_DECLARE_OBJECT(RemapLastColumnVMatrix);
00095     static void declareOptions(OptionList &ol);
00096 
00097     virtual void build();
00098 
00099     virtual void getNewRow(int i, const Vec& samplevec) const;
00100     virtual void reset_dimensions()
00101     {
00102         source->reset_dimensions();
00103 
00104         if( mapping.isEmpty() )
00105             width_=source->width();
00106         else
00107             width_=source->width()+mapping.width()-2;
00108 
00109         length_=source->length();
00110     }
00111 private:
00112     void build_();
00113 };
00114 
00115 inline VMat remapLastColumn(VMat s, Mat mapping, bool call_build_=false)
00116 { return new RemapLastColumnVMatrix(s, mapping, call_build_); }
00117 
00118 inline VMat remapLastColumn(VMat s, real if_equals_value,
00119                             real then_value=1.0, real else_value=-1.0,
00120                             bool call_build_=false)
00121 { return new RemapLastColumnVMatrix(s, if_equals_value,
00122                                     then_value, else_value, call_build_); }
00123 
00124 DECLARE_OBJECT_PTR(RemapLastColumnVMatrix);
00125 
00126 } // end of namespace PLearn
00127 #endif
00128 
00129 
00130 /*
00131   Local Variables:
00132   mode:c++
00133   c-basic-offset:4
00134   c-file-style:"stroustrup"
00135   c-file-offsets:((innamespace . 0)(inline-open . 0))
00136   indent-tabs-mode:nil
00137   fill-column:79
00138   End:
00139 */
00140 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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