PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // SubInputVMatrix.cc 00004 // 00005 // Copyright (C) 2004 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 /* ******************************************************* 00036 * $Id: SubInputVMatrix.cc 5557 2006-05-10 20:36:58Z lamblin $ 00037 ******************************************************* */ 00038 00039 // Authors: Olivier Delalleau 00040 00043 #include "SubInputVMatrix.h" 00044 00045 namespace PLearn { 00046 using namespace std; 00047 00049 // SubInputVMatrix // 00051 SubInputVMatrix::SubInputVMatrix() 00052 : inherited(), 00053 j_start(0), 00054 n_inputs(-1) 00055 { 00056 } 00057 00058 PLEARN_IMPLEMENT_OBJECT(SubInputVMatrix, 00059 "A VMat that only takes part of the input of its source VMat.", 00060 "This can be useful for instance to only take the first k components\n" 00061 "after applying some dimensionality reduction method.\n" 00062 "The other columns (target and weight) are copied from the source.\n" 00063 ); 00064 00066 // declareOptions // 00068 void SubInputVMatrix::declareOptions(OptionList& ol) 00069 { 00070 declareOption(ol, "j_start", &SubInputVMatrix::j_start, OptionBase::buildoption, 00071 "The column we start at."); 00072 00073 declareOption(ol, "n_inputs", &SubInputVMatrix::n_inputs, OptionBase::buildoption, 00074 "The number of inputs to keep (-1 means we keep them all, from j_start)."); 00075 00076 // Now call the parent class' declareOptions 00077 inherited::declareOptions(ol); 00078 } 00079 00081 // build // 00083 void SubInputVMatrix::build() 00084 { 00085 inherited::build(); 00086 build_(); 00087 } 00088 00090 // build_ // 00092 void SubInputVMatrix::build_() 00093 { 00094 if (source) { 00095 if (source->inputsize() < 0) 00096 PLERROR("In SubInputVMatrix::build_ - The source's inputsize must be set"); 00097 if (n_inputs == -1) { 00098 // Default value: we keep all inputs. 00099 n_inputs = source->inputsize() - j_start; 00100 } 00101 if (n_inputs < 0 || n_inputs + j_start > source->inputsize()) { 00102 PLERROR("In SubInputVMatrix::build_ - Source VMatrix hasn't enough inputs"); 00103 } 00104 int n_removed = source->inputsize() - n_inputs; 00105 inputsize_ = n_inputs; 00106 width_ = source->width() - n_removed; 00107 // Set field infos. 00108 Array<VMField>& source_infos = source->getFieldInfos(); 00109 TVec<VMField> finfos(width_); 00110 finfos.subVec(0, inputsize_) << source_infos.subVec(0, inputsize_); 00111 finfos.subVec(inputsize_, finfos.length() - inputsize_) 00112 << source_infos.subVec(source->inputsize(), source_infos.length() - source->inputsize()); 00113 setFieldInfos(finfos); 00114 // Set other meta information. 00115 setMetaInfoFromSource(); 00116 } 00117 } 00118 00120 // getNewRow // 00122 void SubInputVMatrix::getNewRow(int i, const Vec& v) const 00123 { 00124 // First fill the input part. 00125 source->getSubRow(i, j_start, v.subVec(0, n_inputs)); 00126 // Then the rest (target + weight). 00127 source->getSubRow( 00128 i, 00129 source->inputsize(), 00130 v.subVec(n_inputs, v.length() - n_inputs)); 00131 } 00132 00134 // makeDeepCopyFromShallowCopy // 00136 void SubInputVMatrix::makeDeepCopyFromShallowCopy(CopiesMap& copies) 00137 { 00138 inherited::makeDeepCopyFromShallowCopy(copies); 00139 } 00140 00141 } // end of namespace PLearn 00142 00143 00144 /* 00145 Local Variables: 00146 mode:c++ 00147 c-basic-offset:4 00148 c-file-style:"stroustrup" 00149 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00150 indent-tabs-mode:nil 00151 fill-column:79 00152 End: 00153 */ 00154 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :