PLearn 0.1
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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: OneHotVMatrix.h 9456 2008-09-15 17:33:17Z tihocan $ 00039 ******************************************************* */ 00040 00041 00044 #ifndef OneHotVMatrix_INC 00045 #define OneHotVMatrix_INC 00046 00047 #include "SourceVMatrix.h" 00048 #include "VMat.h" 00049 00050 namespace PLearn { 00051 using namespace std; 00052 00053 class OneHotVMatrix: public SourceVMatrix 00054 { 00055 typedef SourceVMatrix inherited; 00056 00057 public: 00058 00059 int nclasses; 00060 real cold_value; 00061 real hot_value; 00062 int index; 00063 00064 public: 00065 00066 // ****************** 00067 // * Constructors * 00068 // ****************** 00069 00071 OneHotVMatrix(bool call_build_ = false); 00072 00074 OneHotVMatrix(VMat the_source, int the_nclasses, 00075 real the_cold_value=0.0, real the_host_value=1.0, 00076 int the_index=-1, bool call_build_ = false); 00077 00078 PLEARN_DECLARE_OBJECT(OneHotVMatrix); 00079 00080 protected: 00081 00082 virtual void getNewRow(int i, const Vec& samplevec) const; 00083 static void declareOptions(OptionList &ol); 00084 00089 void updateNClassesAndWidth(); 00090 00091 public: 00092 00093 virtual void build(); 00094 00095 virtual void reset_dimensions() 00096 { 00097 source->reset_dimensions(); 00098 width_ = source->width() + nclasses - 1; 00099 length_ = source->length(); 00100 } 00101 virtual real dot(int i1, int i2, int inputsize) const; 00102 virtual real dot(int i, const Vec& v) const; 00103 private: 00104 void build_(); 00105 }; 00106 00107 inline VMat onehot(VMat the_source, int nclasses, 00108 real cold_value=0.0, real hot_value=1.0, int index=-1, 00109 bool call_build_=false) 00110 { return new OneHotVMatrix(the_source, nclasses, cold_value, hot_value, index, 00111 call_build_); } 00112 00113 DECLARE_OBJECT_PTR(OneHotVMatrix); 00114 00115 } // end of namespace PLearn 00116 #endif 00117 00118 00119 /* 00120 Local Variables: 00121 mode:c++ 00122 c-basic-offset:4 00123 c-file-style:"stroustrup" 00124 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00125 indent-tabs-mode:nil 00126 fill-column:79 00127 End: 00128 */ 00129 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :