PLearn 0.1
ThresholdVMatrix.cc
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00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 1999-2001 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal
00006 // Copyright (C) 2002 Pascal Vincent, Julien Keable, Xavier Saint-Mleux
00007 //
00008 // Redistribution and use in source and binary forms, with or without
00009 // modification, are permitted provided that the following conditions are met:
00010 //
00011 //  1. Redistributions of source code must retain the above copyright
00012 //     notice, this list of conditions and the following disclaimer.
00013 //
00014 //  2. Redistributions in binary form must reproduce the above copyright
00015 //     notice, this list of conditions and the following disclaimer in the
00016 //     documentation and/or other materials provided with the distribution.
00017 //
00018 //  3. The name of the authors may not be used to endorse or promote
00019 //     products derived from this software without specific prior written
00020 //     permission.
00021 //
00022 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00023 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00024 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00025 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00026 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00027 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00028 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00029 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00030 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00031 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00032 //
00033 // This file is part of the PLearn library. For more information on the PLearn
00034 // library, go to the PLearn Web site at www.plearn.org
00035 
00036 
00037 #include "ThresholdVMatrix.h"
00038 
00039 namespace PLearn {
00040 using namespace std;
00041 
00042 
00045 ThresholdVMatrix::ThresholdVMatrix(bool call_build_)
00046     : threshold(1), cold_value(0), hot_value(1), gt_threshold(true)
00047 {
00048     // build_() isn't defined anyways...
00049 }
00050 
00051 ThresholdVMatrix::ThresholdVMatrix(VMat the_source,
00052                                    real threshold_,
00053                                    real the_cold_value, real the_hot_value,
00054                                    bool gt_threshold_, bool call_build_)
00055     : inherited(the_source,
00056                 the_source->length(), the_source->width(),
00057                 call_build_),
00058       threshold(threshold_),
00059       cold_value(the_cold_value),
00060       hot_value(the_hot_value),
00061       gt_threshold(gt_threshold_)
00062 {
00063     // build_() isn't defined anyways...
00064     updateMtime(the_source);
00065 }
00066 
00067 void ThresholdVMatrix::getNewRow(int i, const Vec& v) const
00068 {
00069 #ifdef BOUNDCHECK
00070     if(i<0 || i>=length())
00071         PLERROR("In ThresholdVMatrix::getNewRow OUT OF BOUNDS");
00072     if(v.length()!=width())
00073         PLERROR("In ThresholdVMatrix::getNewRow v.length() must be equal to the VMat's width");
00074 #endif
00075     source->getRow(i,v);
00076     int p= v.size()-1;
00077     if((gt_threshold && v[p] <= threshold) 
00078        || (!gt_threshold && v[p] < threshold))
00079         v[p]= cold_value;
00080     else
00081         v[p]= hot_value;
00082 }
00083 
00084 } // end of namespace PLearn
00085 
00086 
00087 /*
00088   Local Variables:
00089   mode:c++
00090   c-basic-offset:4
00091   c-file-style:"stroustrup"
00092   c-file-offsets:((innamespace . 0)(inline-open . 0))
00093   indent-tabs-mode:nil
00094   fill-column:79
00095   End:
00096 */
00097 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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