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: MatrixSumOfVariable.h 9436 2008-09-04 18:48:55Z nouiz $ 00040 * This file is part of the PLearn library. 00041 ******************************************************* */ 00042 00043 #ifndef MatrixSumOfVariable_INC 00044 #define MatrixSumOfVariable_INC 00045 00046 #include "NaryVariable.h" 00047 #include <plearn/math/TMat_maths.h> 00048 00049 namespace PLearn { 00050 using namespace std; 00051 00052 00053 class MatrixSumOfVariable: public NaryVariable 00054 { 00055 typedef NaryVariable inherited; 00056 00057 public: 00058 //protected: 00059 VMat distr; 00060 Func f; 00061 int nsamples; 00062 int input_size; 00063 int curpos; 00064 // To avoid allocation/deallocations in fprop/bprop 00065 Vec input_value; 00066 Vec input_gradient; 00067 Vec output_value; 00068 00069 public: 00071 MatrixSumOfVariable() : distr(), f(), nsamples(), input_size(), curpos() {} 00073 MatrixSumOfVariable(VMat the_distr, Func the_f, int the_nsamples=-1, int the_input_size=-1); 00074 00075 PLEARN_DECLARE_OBJECT(MatrixSumOfVariable); 00076 static void declareOptions(OptionList &ol); 00077 00078 virtual void build(); 00079 00080 virtual void recomputeSize(int& l, int& w) const; 00081 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00082 virtual void fprop(); 00083 virtual void bprop(); 00084 virtual void fbprop(); 00085 virtual void symbolicBprop(); 00086 virtual void rfprop(); 00087 00088 void printInfo(bool print_gradient); 00089 00090 protected: 00091 void build_(); 00092 }; 00093 00094 DECLARE_OBJECT_PTR(MatrixSumOfVariable); 00095 00096 // sumOf with matrix as inputs 00097 inline Var sumOf(VMat distr, Func f, int nsamples, int input_size) 00098 { return new MatrixSumOfVariable(distr,f,nsamples,input_size); } 00099 00100 // meanOf with matrix as inputs 00101 inline Var meanOf(VMat distr, Func f, int nsamples, int input_size) 00102 { return new MatrixSumOfVariable(distr, f/nsamples, nsamples, input_size); } 00103 00104 } // end of namespace PLearn 00105 00106 #endif 00107 00108 00109 /* 00110 Local Variables: 00111 mode:c++ 00112 c-basic-offset:4 00113 c-file-style:"stroustrup" 00114 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00115 indent-tabs-mode:nil 00116 fill-column:79 00117 End: 00118 */ 00119 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :