PLearn 0.1
SparseVMatrix.h
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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: SparseVMatrix.h 8239 2007-11-09 15:35:34Z nouiz $
00039  ******************************************************* */
00040 
00041 
00044 #ifndef SparseVMatrix_INC
00045 #define SparseVMatrix_INC
00046 
00047 #include "RowBufferedVMatrix.h"
00048 #include "VMat.h"
00049 
00050 namespace PLearn {
00051 using namespace std;
00052 
00053 
00060 class SparseVMatrixRow
00061 {
00062 public:
00063     int nelements; 
00064     int row_startpos; 
00065     SparseVMatrixRow(): nelements(0), row_startpos(0) {}
00066 };
00067 
00068 class SparseVMatrix : public RowBufferedVMatrix
00069 {
00070     typedef RowBufferedVMatrix inherited;
00071 
00072 protected:
00073     int nelements; 
00074     unsigned short* positions;
00075     float* values;
00076 
00077     SparseVMatrixRow* rows;
00078 
00079 public:
00080 
00081     SparseVMatrix():
00082         nelements(0),
00083         positions(0),
00084         values(0),
00085         rows(0)
00086     {}
00087 
00090     SparseVMatrix(VMat m);
00091 
00093     SparseVMatrix(const string& filename);
00094 
00095     PLEARN_DECLARE_OBJECT(SparseVMatrix);
00096 
00097 protected:
00098 
00099     static void declareOptions(OptionList &ol);
00100     virtual void getNewRow(int i, const Vec& v) const;
00101 
00102 public:
00103 
00104     virtual void build();
00105 
00106     virtual real dot(int i1, int i2, int inputsize) const;
00107     virtual real dot(int i, const Vec& v) const;
00108 
00109     virtual void save(const PPath& filename) const
00110     { Object::save(filename); } 
00111     //virtual void write(ostream& out) const;
00112     //virtual void oldread(istream& in);
00113         
00114     virtual ~SparseVMatrix();
00115 private:
00116     void build_();
00117 };
00118 
00119 DECLARE_OBJECT_PTR(SparseVMatrix);
00120 
00121 } // end of namespace PLearn
00122 #endif
00123 
00124 
00125 /*
00126   Local Variables:
00127   mode:c++
00128   c-basic-offset:4
00129   c-file-style:"stroustrup"
00130   c-file-offsets:((innamespace . 0)(inline-open . 0))
00131   indent-tabs-mode:nil
00132   fill-column:79
00133   End:
00134 */
00135 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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