PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // DiagVariable.cc 00004 // 00005 // Copyright (C) 2008 Pascal Vincent 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 Vincent 00036 00039 #include "NonDiagVariable.h" 00040 // #include "Var_operators.h" 00041 //#include "Var_utils.h" 00042 00043 namespace PLearn { 00044 using namespace std; 00045 00046 00049 PLEARN_IMPLEMENT_OBJECT( 00050 NonDiagVariable, 00051 "Extracts all non-diagonal elements from a matrix source variable as a column vector.", 00052 "Resulting variable is a column vector." 00053 ); 00054 00056 // NonDiagVariable // 00058 00059 NonDiagVariable::NonDiagVariable() 00060 {} 00061 00062 NonDiagVariable::NonDiagVariable(Variable* input, bool call_build_): 00063 inherited(input, input->length()*input->width()-min(input->length(), input->width()), 1, call_build_) 00064 { 00065 if (call_build_) 00066 build_(); 00067 } 00068 00070 // build // 00072 void NonDiagVariable::build() { 00073 inherited::build(); 00074 build_(); 00075 } 00076 00078 // build_ // 00080 void NonDiagVariable::build_() { 00081 // Nothing to do here. 00082 } 00083 00085 // recomputeSize // 00087 void NonDiagVariable::recomputeSize(int& l, int& w) const 00088 { 00089 if (input) 00090 { 00091 l = input->length()*input->width()-min(input->length(), input->width()); 00092 w = 1; 00093 } 00094 else 00095 l = w = 0; 00096 } 00097 00098 00099 void NonDiagVariable::fprop() 00100 { 00101 Mat V = input->matValue; 00102 int l = V.length(); 00103 int w = V.width(); 00104 int k=0; 00105 for(int i=0; i<l; i++) 00106 for(int j=0; j<w; j++) 00107 if(i!=j) 00108 value[k++] = V(i,j); 00109 } 00110 00111 void NonDiagVariable::bprop() 00112 { 00113 Mat G = input->matGradient; 00114 int l = G.length(); 00115 int w = G.width(); 00116 int k=0; 00117 for(int i=0; i<l; i++) 00118 for(int j=0; j<w; j++) 00119 if(i!=j) 00120 G(i,j) += gradient[k++]; 00121 } 00122 00123 00124 void NonDiagVariable::bbprop() 00125 { 00126 PLERROR("bbprop not implemented for this variable"); 00127 } 00128 00129 00130 void NonDiagVariable::symbolicBprop() 00131 { 00132 PLERROR("symbolic bprop not yet implemented for this variable"); 00133 } 00134 00135 00136 void NonDiagVariable::rfprop() 00137 { 00138 PLERROR("rfprop no yet implemented for this vairable"); 00139 } 00140 00141 00142 00143 } // end of namespace PLearn 00144 00145 00146 /* 00147 Local Variables: 00148 mode:c++ 00149 c-basic-offset:4 00150 c-file-style:"stroustrup" 00151 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00152 indent-tabs-mode:nil 00153 fill-column:79 00154 End: 00155 */ 00156 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :