PLearn 0.1
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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: ColumnSumVariable.h 5911 2006-06-20 16:31:05Z tihocan $ 00040 * This file is part of the PLearn library. 00041 ******************************************************* */ 00042 00043 #ifndef ColumnSumVariable_INC 00044 #define ColumnSumVariable_INC 00045 00046 #include "UnaryVariable.h" 00047 00048 namespace PLearn { 00049 using namespace std; 00050 00051 00053 class ColumnSumVariable: public UnaryVariable 00054 { 00055 00056 private: 00057 00058 typedef UnaryVariable inherited; 00059 00060 public: 00061 00063 ColumnSumVariable() {} 00064 00065 public: 00066 ColumnSumVariable(Variable* input); 00067 PLEARN_DECLARE_OBJECT(ColumnSumVariable); 00068 virtual void recomputeSize(int& l, int& w) const; 00069 00070 00071 virtual void fprop(); 00072 virtual void bprop(); 00073 virtual void symbolicBprop(); 00074 00075 }; 00076 00077 00078 inline Var columnSum(Var v) 00079 { 00080 if(v->isRowVec()) 00081 return v; 00082 else 00083 return new ColumnSumVariable(v); 00084 } 00085 00086 } // end of namespace PLearn 00087 00088 #endif 00089 00090 00091 /* 00092 Local Variables: 00093 mode:c++ 00094 c-basic-offset:4 00095 c-file-style:"stroustrup" 00096 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00097 indent-tabs-mode:nil 00098 fill-column:79 00099 End: 00100 */ 00101 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :