PLearn 0.1
IsMissingVariable.cc
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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, Rejean Ducharme and University of Montreal
00006 // Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal
00007 // Copyright (C) 2002 Xiangdong Wang, Christian Dorion
00008 
00009 // Redistribution and use in source and binary forms, with or without
00010 // modification, are permitted provided that the following conditions are met:
00011 // 
00012 //  1. Redistributions of source code must retain the above copyright
00013 //     notice, this list of conditions and the following disclaimer.
00014 // 
00015 //  2. Redistributions in binary form must reproduce the above copyright
00016 //     notice, this list of conditions and the following disclaimer in the
00017 //     documentation and/or other materials provided with the distribution.
00018 // 
00019 //  3. The name of the authors may not be used to endorse or promote
00020 //     products derived from this software without specific prior written
00021 //     permission.
00022 // 
00023 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00024 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00025 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00026 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00027 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00028 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00029 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00030 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00031 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00032 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033 // 
00034 // This file is part of the PLearn library. For more information on the PLearn
00035 // library, go to the PLearn Web site at www.plearn.org
00036 
00037 
00038 /* *******************************************************      
00039  * $Id: IsMissingVariable.cc 5707 2006-05-29 20:54:47Z larocheh $
00040  * This file is part of the PLearn library.
00041  ******************************************************* */
00042 
00043 #include "IsMissingVariable.h"
00044 
00045 namespace PLearn {
00046 using namespace std;
00047 
00048 
00051 PLEARN_IMPLEMENT_OBJECT(IsMissingVariable,
00052                         "ONE LINE DESCR",
00053                         "NO HELP");
00054 
00055 IsMissingVariable::IsMissingVariable(Variable* input1, bool parall, bool the_set_parallel_missing_output, Vec the_parallel_missing_outputs)
00056     : inherited(input1, parall?input1->length():1, parall?input1->width():1), parallel(parall), set_parallel_missing_output(the_set_parallel_missing_output), parallel_missing_outputs(the_parallel_missing_outputs)
00057 {}
00058 
00059 void
00060 IsMissingVariable::declareOptions(OptionList &ol)
00061 {
00062     declareOption(ol, "parallel", &IsMissingVariable::parallel, OptionBase::buildoption, "");
00063     inherited::declareOptions(ol);
00064     declareOption(ol, "parallel_missing_outputs", &IsMissingVariable::parallel_missing_outputs, OptionBase::buildoption, "");
00065     declareOption(ol, "set_parallel_missing_output", &IsMissingVariable::set_parallel_missing_output, OptionBase::buildoption, "");
00066     inherited::declareOptions(ol);
00067 }
00068 
00069 void IsMissingVariable::build()
00070 {
00071     inherited::build();
00072     build_();
00073 }
00074 
00075 void IsMissingVariable::build_()
00076 {
00077     if(parallel_missing_outputs.length() != input->size())
00078         PLERROR("In IsMissingVariable::build_(): parallel_missing_outputs' size is different from input size.");
00079 }
00080 
00081 void IsMissingVariable::recomputeSize(int& l, int& w) const
00082 {
00083     if (input) {
00084         l = parallel ? input->length() : 1;
00085         w = parallel ? input->width() : 1;
00086     } else
00087         l = w = 0;
00088 }
00089 
00090 void IsMissingVariable::fprop()
00091 {
00092     if (parallel)
00093     {
00094         if(!set_parallel_missing_output)
00095             for(int i=0; i<nelems(); i++)
00096                 valuedata[i] = finite(input->valuedata[i]);
00097         else
00098             for(int i=0; i<nelems(); i++)
00099             {
00100                 if(!finite(input->valuedata[i]))
00101                     valuedata[i] = parallel_missing_outputs[i];
00102                 else
00103                     valuedata[i] = input->valuedata[i];
00104             }
00105     }
00106     else
00107     {
00108         bool nomissing=true;
00109         for(int i=0; i<nelems(); i++)
00110             nomissing = nomissing && finite(input->valuedata[i]);
00111         valuedata[0] = !nomissing;
00112     }
00113 }
00114 
00115 
00116 // not really differentiable (zero gradient almost everywhere)
00117 void IsMissingVariable::bprop() {}
00118 
00119 void IsMissingVariable::symbolicBprop() {}
00120 
00121 void IsMissingVariable::makeDeepCopyFromShallowCopy(CopiesMap& copies)
00122 {
00123     inherited::makeDeepCopyFromShallowCopy(copies);
00124 
00125     deepCopyField(parallel_missing_outputs, copies);
00126     //PLERROR("IsMissingVariable::makeDeepCopyFromShallowCopy not fully (correctly) implemented yet!");
00127 }
00128 
00129 
00130 } // end of namespace PLearn
00131 
00132 
00133 /*
00134   Local Variables:
00135   mode:c++
00136   c-basic-offset:4
00137   c-file-style:"stroustrup"
00138   c-file-offsets:((innamespace . 0)(inline-open . 0))
00139   indent-tabs-mode:nil
00140   fill-column:79
00141   End:
00142 */
00143 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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