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: SumOverBagsVariable.h 9436 2008-09-04 18:48:55Z nouiz $ 00040 * This file is part of the PLearn library. 00041 ******************************************************* */ 00042 00043 #ifndef SumOverBagsVariable_INC 00044 #define SumOverBagsVariable_INC 00045 00046 #include "NaryVariable.h" 00047 00048 namespace PLearn { 00049 using namespace std; 00050 00051 00052 class SumOverBagsVariable: public NaryVariable 00053 { 00054 typedef NaryVariable inherited; 00055 00056 public: 00057 //protected: 00058 VMat vmat; 00059 Func f; 00060 bool average; 00061 int max_bag_size; 00062 int n_samples; 00063 bool transpose; 00064 00065 int curpos; 00066 // To avoid allocation/deallocations in fprop/bprop 00067 Vec output_value; 00068 Mat input_values; 00069 Vec bag_size_vec; 00070 Vec bag_target_and_bag_signal; 00071 Vec bag_target; 00072 Vec bag_signal; 00073 Vec bag_weight; 00074 Array<Vec> f_inputs; // (matrix of bag inputs, the bag size, the bag target, the bag weight) 00075 Array<Vec> unused_gradients; 00076 Array<Vec> output_av; // Array<Vec>(output_value) 00077 Array<Vec> gradient_av; // Array<Vec>(gradient) 00078 int bag_size; 00079 00080 public: 00082 SumOverBagsVariable(); 00092 SumOverBagsVariable(VMat the_vmat, Func the_f, int maxbagsize, 00093 int nsamples, bool average, 00094 bool transpose = false, bool call_build_ = true); 00095 00097 static const int TARGET_COLUMN_FIRST = 1; 00098 static const int TARGET_COLUMN_LAST = 2; 00099 static const int TARGET_COLUMN_SINGLE = 3; // Beginning == End 00100 static const int TARGET_COLUMN_INTERMEDIATE = 0; 00101 00102 PLEARN_DECLARE_OBJECT(SumOverBagsVariable); 00103 00104 virtual void build(); 00105 00106 virtual void recomputeSize(int& l, int& w) const; 00107 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00108 virtual void fprop(); 00109 virtual void bprop(); 00110 virtual void fbprop(); 00111 virtual void fpropOneBag(bool do_bprop=false); 00112 00113 void printInfo(bool print_gradient); 00114 00115 static void declareOptions(OptionList& ol); 00116 00117 protected: 00118 void build_(); 00119 }; 00120 00121 DECLARE_OBJECT_PTR(SumOverBagsVariable); 00122 00124 inline Var sumOverBags(VMat vmat, Func f, int max_bag_size, int nsamples, bool average = false, bool transpose = false) 00125 { return new SumOverBagsVariable(vmat, f, max_bag_size, nsamples, average, transpose); } 00126 00127 } // end of namespace PLearn 00128 00129 #endif 00130 00131 00132 /* 00133 Local Variables: 00134 mode:c++ 00135 c-basic-offset:4 00136 c-file-style:"stroustrup" 00137 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00138 indent-tabs-mode:nil 00139 fill-column:79 00140 End: 00141 */ 00142 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :