PLearn 0.1
RemoveRowsVMatrix.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: RemoveRowsVMatrix.h 8247 2007-11-12 20:22:12Z nouiz $
00039  ******************************************************* */
00040 
00041 
00044 #ifndef RemoveRowsVMatrix_INC
00045 #define RemoveRowsVMatrix_INC
00046 
00047 #include "VMat.h"
00048 
00049 namespace PLearn {
00050 using namespace std;
00051  
00053 class RemoveRowsVMatrix: public VMatrix
00054 {
00055     typedef VMatrix inherited;
00056 
00057 protected:
00058     VMat distr;
00059     Vec indices;
00060 
00062     int getrownum(int i) const; 
00063 
00064 public:
00065     virtual void reset_dimensions() { distr->reset_dimensions(); width_=distr->width(); }
00066 
00067     // ******************
00068     // *  Constructors  *
00069     // ******************
00070     RemoveRowsVMatrix() {}; 
00071 
00073     RemoveRowsVMatrix(VMat the_distr, Vec the_indices=Vec() );
00074 
00075     PLEARN_DECLARE_OBJECT(RemoveRowsVMatrix);
00076     static void declareOptions(OptionList &ol);
00077 
00078     virtual void build();
00079 
00081     void remove(int rownum)
00082     { 
00083         indices.insertSorted(rownum,true); 
00084         length_--;
00085     }
00086 
00087     void unremove(int rownum)
00088     {
00089         indices.removeSorted(rownum);
00090         length_++;
00091     }
00092 
00093     virtual real get(int i, int j) const;
00094     virtual void getSubRow(int i, int j, Vec v) const;
00095     virtual real dot(int i1, int i2, int inputsize) const;
00096     virtual real dot(int i, const Vec& v) const;
00097 
00098 private:
00099     void build_();
00100 };
00101 
00102 inline VMat removeRows(VMat d, Vec rownums)
00103 { return new RemoveRowsVMatrix(d,rownums); }
00104 
00105 inline VMat removeRow(VMat d, int rownum)
00106 { return new RemoveRowsVMatrix(d,Vec(1,rownum)); }
00107 
00108 DECLARE_OBJECT_PTR(RemoveRowsVMatrix);
00109 
00110 } // end of namespace PLearn
00111 #endif
00112 
00113 
00114 /*
00115   Local Variables:
00116   mode:c++
00117   c-basic-offset:4
00118   c-file-style:"stroustrup"
00119   c-file-offsets:((innamespace . 0)(inline-open . 0))
00120   indent-tabs-mode:nil
00121   fill-column:79
00122   End:
00123 */
00124 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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