PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // PlusManyVariable.cc 00004 // 00005 // Copyright (C) 2008 Olivier Delalleau 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: Olivier Delalleau 00036 00040 #include "PlusManyVariable.h" 00041 00042 namespace PLearn { 00043 using namespace std; 00044 00047 PLEARN_IMPLEMENT_OBJECT( 00048 PlusManyVariable, 00049 "Sum of an arbitrary number of variables (that must have same sizes).", 00050 "" 00051 ); 00052 00054 // PlusManyVariable // 00056 PlusManyVariable::PlusManyVariable() 00057 {} 00058 00059 PlusManyVariable::PlusManyVariable(const VarArray& the_array, 00060 bool call_build_): 00061 inherited(the_array, the_array[0]->length(), the_array[0]->width(), 00062 call_build_) 00063 { 00064 if (call_build_) 00065 build_(); 00066 } 00067 00069 // recomputeSize // 00071 void PlusManyVariable::recomputeSize(int& l, int& w) const 00072 { 00073 if (varray.length() > 0) { 00074 l = varray[0]->length(); 00075 w = varray[0]->width(); 00076 } else 00077 l = w = 0; 00078 } 00079 00081 // fprop // 00083 void PlusManyVariable::fprop() 00084 { 00085 fillValue(0); 00086 int n = nelems(); 00087 for (int i = 0; i < varray.length(); i++) { 00088 real* vi = varray[i]->valuedata; 00089 for (int k=0; k<n; k++) 00090 valuedata[k] += vi[k]; 00091 } 00092 } 00093 00095 // bprop // 00097 void PlusManyVariable::bprop() 00098 { 00099 int n = nelems(); 00100 for (int i = 0; i < varray.length(); i++) { 00101 real* vi = varray[i]->gradientdata; 00102 for (int k=0; k<n; k++) 00103 vi[k] += gradientdata[k]; 00104 } 00105 } 00106 00108 // build // 00110 void PlusManyVariable::build() 00111 { 00112 inherited::build(); 00113 build_(); 00114 } 00115 00117 // makeDeepCopyFromShallowCopy // 00119 void PlusManyVariable::makeDeepCopyFromShallowCopy(CopiesMap& copies) 00120 { 00121 inherited::makeDeepCopyFromShallowCopy(copies); 00122 } 00123 00125 // declareOptions // 00127 void PlusManyVariable::declareOptions(OptionList& ol) 00128 { 00129 // Now call the parent class' declareOptions 00130 inherited::declareOptions(ol); 00131 } 00132 00134 // build_ // 00136 void PlusManyVariable::build_() 00137 { 00138 // Check sizes are coherent. 00139 if (varray.length() >= 2) { 00140 int l = varray[0]->length(); 00141 int w = varray[1]->width(); 00142 for (int i = 1; i < varray.length(); i++) 00143 if (varray[i]->length() != l || varray[i]->width() != w) 00144 PLERROR("In PlusManyVariable::build_ - All source variables " 00145 "must have the same size"); 00146 } 00147 } 00148 00149 00150 } // end of namespace PLearn 00151 00152 00153 /* 00154 Local Variables: 00155 mode:c++ 00156 c-basic-offset:4 00157 c-file-style:"stroustrup" 00158 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00159 indent-tabs-mode:nil 00160 fill-column:79 00161 End: 00162 */ 00163 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :