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) 1999-2002 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal 00006 // Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal 00007 // Copyright (C) 2002 Xiangdong Wang, Christian Dorion 00008 00009 // Redistribution and use in source and binary forms, with or without 00010 // modification, are permitted provided that the following conditions are met: 00011 // 00012 // 1. Redistributions of source code must retain the above copyright 00013 // notice, this list of conditions and the following disclaimer. 00014 // 00015 // 2. Redistributions in binary form must reproduce the above copyright 00016 // notice, this list of conditions and the following disclaimer in the 00017 // documentation and/or other materials provided with the distribution. 00018 // 00019 // 3. The name of the authors may not be used to endorse or promote 00020 // products derived from this software without specific prior written 00021 // permission. 00022 // 00023 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 00024 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00025 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00026 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00027 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00028 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00029 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00030 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00031 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00032 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00033 // 00034 // This file is part of the PLearn library. For more information on the PLearn 00035 // library, go to the PLearn Web site at www.plearn.org 00036 00037 00038 /* ******************************************************* 00039 * $Id: CCCostVariable.h 3994 2005-08-25 13:35:03Z chapados $ 00040 * This file is part of the PLearn library. 00041 ******************************************************* */ 00042 00043 #ifndef CCCostVariable_INC 00044 #define CCCostVariable_INC 00045 00046 #include "NaryVariable.h" 00047 00048 namespace PLearn { 00049 using namespace std; 00050 00051 00052 class CCCostVariable: public NaryVariable 00053 { 00054 typedef NaryVariable inherited; 00055 00056 public: 00057 00058 VMat distr; 00059 Func f_error; 00060 Func f_candidate; 00061 // To avoid allocation/deallocations in fprop/bprop 00062 Vec input_value; 00063 Vec input_gradient; 00064 Vec error_output_value; 00065 Vec candidate_output_value; 00066 Vec error_correlations; 00067 Vec adjusted_gradient; 00068 private: 00069 Vec mean_error; 00070 real mean_candidate; 00071 00072 public: 00074 CCCostVariable() : distr(), f_error(), f_candidate() {} 00076 CCCostVariable(VMat the_distr, Func the_f, Func f_candidate); 00077 00078 PLEARN_DECLARE_OBJECT(CCCostVariable); 00079 static void declareOptions(OptionList &ol); 00080 00081 virtual void build(); 00082 00083 virtual void recomputeSize(int& l, int& w) const; 00084 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00085 virtual void fprop(); 00086 virtual void bprop(); 00087 virtual void fbprop(); 00088 virtual void symbolicBprop(); 00089 virtual void rfprop(); 00090 00091 void printInfo(bool print_gradient); 00092 00093 protected: 00094 void build_(); 00095 }; 00096 00097 DECLARE_OBJECT_PTR(CCCostVariable); 00098 00100 inline Var cccost(VMat distr, Func the_f_error, Func the_f_candidate) 00101 { return new CCCostVariable(distr,the_f_error,the_f_candidate); } 00102 00103 } // end of namespace PLearn 00104 00105 #endif 00106 00107 00108 /* 00109 Local Variables: 00110 mode:c++ 00111 c-basic-offset:4 00112 c-file-style:"stroustrup" 00113 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00114 indent-tabs-mode:nil 00115 fill-column:79 00116 End: 00117 */ 00118 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :