PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // CrossEntropyCostModule.h 00004 // 00005 // Copyright (C) 2007 Pascal Lamblin, Dumitru Erhan and 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 // Authors: Pascal Lamblin, Dumitru Erhan and Hugo Larochelle 00036 00040 #ifndef CrossEntropyCostModule_INC 00041 #define CrossEntropyCostModule_INC 00042 00043 #include <plearn_learners/online/CostModule.h> 00044 00045 namespace PLearn { 00046 00050 class CrossEntropyCostModule : public CostModule 00051 { 00052 typedef CostModule inherited; 00053 00054 public: 00055 //##### Public Build Options ############################################ 00056 00057 00058 public: 00059 //##### Public Member Functions ######################################### 00060 00062 CrossEntropyCostModule(); 00063 00064 // Your other public member functions go here 00065 00067 virtual void fprop(const Vec& input, const Vec& target, real& cost) const; 00068 virtual void fprop(const Vec& input, const Vec& target, Vec& cost) const; 00069 virtual void fprop(const Mat& input, const Mat& target, Mat& cost) const; 00070 00072 virtual void bpropUpdate(const Vec& input, const Vec& target, real cost, 00073 Vec& input_gradient, bool accumulate=false); 00074 00076 virtual void bpropUpdate(const Mat& inputs, const Mat& targets, 00077 const Vec& costs, Mat& input_gradients, 00078 bool accumulate=false); 00079 00081 virtual void bpropAccUpdate(const TVec<Mat*>& ports_value, 00082 const TVec<Mat*>& ports_gradient); 00083 00085 virtual void setLearningRate(real dynamic_learning_rate) {} 00086 00088 virtual TVec<string> costNames(); 00089 00090 //##### PLearn::Object Protocol ######################################### 00091 00092 // Declares other standard object methods. 00093 // ### If your class is not instantiatable (it has pure virtual methods) 00094 // ### you should replace this by PLEARN_DECLARE_ABSTRACT_OBJECT 00095 PLEARN_DECLARE_OBJECT(CrossEntropyCostModule); 00096 00097 // Simply calls inherited::build() then build_() 00098 virtual void build(); 00099 00101 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00102 00103 00104 protected: 00105 //##### Protected Member Functions ###################################### 00106 00108 static void declareOptions(OptionList& ol); 00109 00110 private: 00111 //##### Private Member Functions ######################################## 00112 00114 void build_(); 00115 00116 private: 00117 //##### Private Data Members ############################################ 00118 00119 // The rest of the private stuff goes here 00120 }; 00121 00122 // Declares a few other classes and functions related to this class 00123 DECLARE_OBJECT_PTR(CrossEntropyCostModule); 00124 00125 } // end of namespace PLearn 00126 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 :