PLearn 0.1
OutputVariable.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: OutputVariable.cc 3994 2005-08-25 13:35:03Z chapados $
00040  * This file is part of the PLearn library.
00041  ******************************************************* */
00042 
00043 #include "OutputVariable.h"
00044 #include "Var_operators.h"
00045 #include <plearn/math/plapack.h>
00046 
00047 namespace PLearn {
00048 using namespace std;
00049 
00050 
00053 PLEARN_IMPLEMENT_OBJECT(OutputVariable, "Output var contents to a file.", 
00054                         "Just writes the var contents to a file.\n");
00055 
00056 OutputVariable::OutputVariable(Variable* input, char* filename)
00057     : inherited(input, input->length(),input->width()) 
00058 {
00059     output_file = new ofstream(filename);
00060 }
00061 
00062 OutputVariable::~OutputVariable()
00063 {
00064     output_file->close();
00065     delete output_file;
00066 }
00067 
00068 void OutputVariable::recomputeSize(int& l, int& w) const
00069 {
00070     if (input) {
00071         l = input->length();
00072         w = input->width();
00073     } else
00074         l = w = 0;
00075 }
00076 
00077 
00078 void OutputVariable::fprop()
00079 {
00080     *output_file << input->value << "\n";
00081 
00082     for(int k=0; k<input->nelems(); k++) {
00083         valuedata[k] = input->valuedata[k];
00084     }
00085 }
00086 
00087 
00088 void OutputVariable::bprop() 
00089 {
00090     for(int k=0; k<input->nelems(); k++) {
00091         input->gradientdata[k] += gradientdata[k];
00092     }
00093 }
00094 
00095 void OutputVariable::symbolicBprop()
00096 {
00097     PLERROR("In OutputVariable::symbolicBprop: feature not implemented");
00098 }
00099 
00100 
00101 void OutputVariable::rfprop()
00102 {
00103     PLERROR("In OutputVariable::rfprop: feature not implemented");
00104 }
00105 
00106 
00107 
00108 } // end of namespace PLearn
00109 
00110 
00111 /*
00112   Local Variables:
00113   mode:c++
00114   c-basic-offset:4
00115   c-file-style:"stroustrup"
00116   c-file-offsets:((innamespace . 0)(inline-open . 0))
00117   indent-tabs-mode:nil
00118   fill-column:79
00119   End:
00120 */
00121 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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