PLearn 0.1
RemoveRowsVMatrix.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 /* *******************************************************      
00038  * $Id: RemoveRowsVMatrix.cc 5176 2006-03-13 22:40:51Z lamblin $
00039  ******************************************************* */
00040 
00041 #include "RemoveRowsVMatrix.h"
00042 
00043 namespace PLearn {
00044 using namespace std;
00045 
00048 PLEARN_IMPLEMENT_OBJECT(RemoveRowsVMatrix, "ONE LINE DESC", "NO HELP");
00049 
00050 RemoveRowsVMatrix::RemoveRowsVMatrix(VMat the_distr, Vec the_indices)
00051     : inherited(the_distr->length()-the_indices.length(), the_distr->width()),
00052       distr(the_distr), indices(the_indices.copy())
00053 {
00054     build();
00055 }
00056 
00057 void
00058 RemoveRowsVMatrix::build()
00059 {
00060     inherited::build();
00061     build_();
00062 }
00063 
00064 void
00065 RemoveRowsVMatrix::build_()
00066 {
00067     if (distr)
00068         fieldinfos = distr->fieldinfos;
00069     if (indices)
00070         sortElements(indices);
00071 }
00072 
00073 void
00074 RemoveRowsVMatrix::declareOptions(OptionList &ol)
00075 {
00076     declareOption(ol, "distr", &RemoveRowsVMatrix::distr, OptionBase::buildoption, "");
00077     declareOption(ol, "indices", &RemoveRowsVMatrix::indices, OptionBase::buildoption, "");
00078     inherited::declareOptions(ol);
00079 }
00080 
00081 int RemoveRowsVMatrix::getrownum(int i) const
00082 {
00083     int k=0;
00084     while(k<indices.length() && indices[k]<=i)
00085     {
00086         i++;
00087         k++;
00088     }
00089     return i;
00090 }
00091 
00092 real RemoveRowsVMatrix::get(int i, int j) const
00093 { return distr->get(getrownum(i), j); }
00094 
00095 void RemoveRowsVMatrix::getSubRow(int i, int j, Vec v) const
00096 { distr->getSubRow(getrownum(i), j, v); }
00097 
00098 real RemoveRowsVMatrix::dot(int i1, int i2, int inputsize) const
00099 { return distr->dot(getrownum(i1),getrownum(i2),inputsize); }
00100 
00101 real RemoveRowsVMatrix::dot(int i, const Vec& v) const
00102 { return distr->dot(getrownum(i),v); }
00103 
00104 
00105 } // end of namespace PLearn
00106 
00107 
00108 /*
00109   Local Variables:
00110   mode:c++
00111   c-basic-offset:4
00112   c-file-style:"stroustrup"
00113   c-file-offsets:((innamespace . 0)(inline-open . 0))
00114   indent-tabs-mode:nil
00115   fill-column:79
00116   End:
00117 */
00118 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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