PLearn 0.1
DiagonalizedFactorsProductVariable.h
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00001 // -*- C++ -*-
00002 
00003 // PLearn (A C++ Machine Learning Library)
00004 // Copyright (C) 1998 Pascal Vincent
00005 // Copyright (C) 1999-2002 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: DiagonalizedFactorsProductVariable.h 3994 2005-08-25 13:35:03Z chapados $
00040  * This file is part of the PLearn library.
00041  ******************************************************* */
00042 
00043 #ifndef DiagonalizedFactorsProductVariable_INC
00044 #define DiagonalizedFactorsProductVariable_INC
00045 
00046 #include "NaryVariable.h"
00047 
00048 namespace PLearn {
00049 using namespace std;
00050 
00051 
00058 class DiagonalizedFactorsProductVariable: public NaryVariable
00059 {
00060     typedef NaryVariable inherited;
00061 
00062 public:
00063     bool transpose_left, transpose_right;
00064 
00066     DiagonalizedFactorsProductVariable() {}
00067     DiagonalizedFactorsProductVariable(Var left_matrix, Var center_diagonal, Var right_matrix,
00068                                        bool transpose_left=false, bool transpose_right=false);
00069 
00070     PLEARN_DECLARE_OBJECT(DiagonalizedFactorsProductVariable);
00071 
00072     virtual void build();
00073 
00074     virtual void recomputeSize(int& l, int& w) const;
00075     virtual void fprop();
00076     virtual void bprop();
00077     Var& leftMatrix() { return varray[0]; }
00078     Var& centerDiagonal() { return varray[1]; }
00079     Var& rightMatrix() { return varray[2]; }
00080 
00081 protected:
00082     void build_();
00083 };
00084 
00085 DECLARE_OBJECT_PTR(DiagonalizedFactorsProductVariable);
00086 
00087 inline Var diagonalized_factors_product(Var left_matrix, Var center_diagonal, Var right_matrix)
00088 { return new DiagonalizedFactorsProductVariable(left_matrix,center_diagonal,right_matrix); }
00089 
00090 } // end of namespace PLearn
00091 
00092 #endif 
00093 
00094 
00095 /*
00096   Local Variables:
00097   mode:c++
00098   c-basic-offset:4
00099   c-file-style:"stroustrup"
00100   c-file-offsets:((innamespace . 0)(inline-open . 0))
00101   indent-tabs-mode:nil
00102   fill-column:79
00103   End:
00104 */
00105 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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