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 and University of Montreal 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 00036 00037 00038 /* ******************************************************* 00039 * $Id: SourceVariable.h 9095 2008-06-03 21:10:27Z plearner $ 00040 * This file is part of the PLearn library. 00041 ******************************************************* */ 00042 00043 #ifndef SourceVariable_INC 00044 #define SourceVariable_INC 00045 00046 #include "VarArray.h" 00047 #include <plearn/math/PRandom.h> 00048 00049 namespace PLearn { 00050 using namespace std; 00051 00052 class SourceVariable: public Variable 00053 { 00054 typedef Variable inherited; 00055 00056 public: 00057 // build options 00058 int build_length; 00059 int build_width; 00060 00061 string random_type; 00062 00063 real random_a; 00064 real random_b; 00065 00066 bool random_clear_first_row; 00067 00068 private: 00069 void build_(); 00070 public: 00071 virtual void build(); 00072 00073 protected: 00074 static void declareOptions(OptionList & ol); 00075 00076 public: 00078 SourceVariable(); 00079 SourceVariable(int thelength, int thewidth, bool call_build_ = true); 00080 SourceVariable(const Vec& v, bool vertical=true, bool call_build_ = true); 00081 SourceVariable(const Mat& m, bool call_build_ = true); 00082 SourceVariable(int thelength, int thewidth, string random_type_, 00083 real random_a_=0, real random_b_=1, bool clear_first_row_=false, 00084 bool call_build_ = true); 00085 00086 virtual void setParents(const VarArray& parents) 00087 { PLERROR("In Variable::setParents trying to set parents of a SourceVariable..."); } 00088 00089 00090 virtual bool markPath(); 00091 virtual void buildPath(VarArray& proppath); 00092 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00093 PLEARN_DECLARE_OBJECT(SourceVariable); 00094 00097 virtual void randomInitialize(PP<PRandom> random_gen); 00098 00099 virtual void fprop(); 00100 virtual void bprop(); 00101 virtual void bbprop(); 00102 virtual void symbolicBprop(); 00103 virtual void rfprop(); 00104 virtual VarArray sources(); 00105 virtual VarArray random_sources(); 00106 virtual VarArray ancestors(); 00107 virtual void unmarkAncestors(); 00108 virtual VarArray parents(); 00109 bool isConstant() { return true; } 00110 00111 void printInfo(bool print_gradient) { 00112 pout << getName() << "[" << (void*)this << "] " << *this << " = " << value; 00113 if (print_gradient) pout << " gradient=" << gradient; 00114 pout << endl; 00115 } 00116 }; 00117 00118 DECLARE_OBJECT_PTR(SourceVariable); 00119 00120 } // end of namespace PLearn 00121 00122 #endif 00123 00124 00125 /* 00126 Local Variables: 00127 mode:c++ 00128 c-basic-offset:4 00129 c-file-style:"stroustrup" 00130 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00131 indent-tabs-mode:nil 00132 fill-column:79 00133 End: 00134 */ 00135 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :