PLearn 0.1
|
00001 // -*- C++ -*- 00002 00003 // RBMLayer.cc 00004 // 00005 // Copyright (C) 2006 Pascal Lamblin & Dan Popovici 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 Lamblin & Dan Popovici 00036 00039 #include "RBMLayer.h" 00040 #include <plearn/math/TMat_maths.h> 00041 #include <plearn/math/PRandom.h> 00042 #include "RBMParameters.h" 00043 00044 namespace PLearn { 00045 using namespace std; 00046 00047 PLEARN_IMPLEMENT_ABSTRACT_OBJECT( 00048 RBMLayer, 00049 "Virtual class for a layer of an RBM", 00050 ""); 00051 00052 RBMLayer::RBMLayer() : 00053 size(-1), 00054 expectation_is_up_to_date(false) 00055 { 00056 } 00057 00058 void RBMLayer::reset() 00059 { 00060 activations.clear(); 00061 sample.clear(); 00062 expectation.clear(); 00063 expectation_is_up_to_date = false; 00064 } 00065 00066 void RBMLayer::declareOptions(OptionList& ol) 00067 { 00068 declareOption(ol, "units_types", &RBMLayer::units_types, 00069 OptionBase::learntoption, 00070 "Each character of this string describes the type of an" 00071 " up unit:\n" 00072 " - 'l' if the energy function of this unit is linear\n" 00073 " (binomial or multinomial unit),\n" 00074 " - 'q' if it is quadratic (for a gaussian unit).\n"); 00075 00076 declareOption(ol, "random_gen", &RBMLayer::random_gen, 00077 OptionBase::buildoption, 00078 "Random generator."); 00079 00080 declareOption(ol, "size", &RBMLayer::size, 00081 OptionBase::buildoption, 00082 "Numer of units."); 00083 00084 00085 // Now call the parent class' declareOptions 00086 inherited::declareOptions(ol); 00087 } 00088 00089 void RBMLayer::build_() 00090 { 00091 if( size <= 0 ) 00092 return; 00093 00094 if( !random_gen ) 00095 random_gen = new PRandom(); 00096 random_gen->build(); 00097 } 00098 00099 void RBMLayer::build() 00100 { 00101 inherited::build(); 00102 build_(); 00103 } 00104 00105 00106 void RBMLayer::makeDeepCopyFromShallowCopy(CopiesMap& copies) 00107 { 00108 inherited::makeDeepCopyFromShallowCopy(copies); 00109 00110 deepCopyField(random_gen, copies); 00111 deepCopyField(activations, copies); 00112 deepCopyField(sample, copies); 00113 deepCopyField(expectation, copies); 00114 } 00115 00116 00117 } // end of namespace PLearn 00118 00119 00120 /* 00121 Local Variables: 00122 mode:c++ 00123 c-basic-offset:4 00124 c-file-style:"stroustrup" 00125 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00126 indent-tabs-mode:nil 00127 fill-column:79 00128 End: 00129 */ 00130 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :