PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // Cov2CorrVariable.h 00004 // 00005 // Copyright (C) 2008 Pascal Vincent 00006 // 00007 // Redistribution and use in source and binary forms, with or without 00008 // modification, are permitted provided that the following conditions are met: 00009 // 00010 // 1. Redistributions of source code must retain the above copyright 00011 // notice, this list of conditions and the following disclaimer. 00012 // 00013 // 2. Redistributions in binary form must reproduce the above copyright 00014 // notice, this list of conditions and the following disclaimer in the 00015 // documentation and/or other materials provided with the distribution. 00016 // 00017 // 3. The name of the authors may not be used to endorse or promote 00018 // products derived from this software without specific prior written 00019 // permission. 00020 // 00021 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 00022 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00023 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00024 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00025 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00026 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00027 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00028 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00029 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00030 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00031 // 00032 // This file is part of the PLearn library. For more information on the PLearn 00033 // library, go to the PLearn Web site at www.plearn.org 00034 00035 // Authors: Pascal Vincent 00036 00039 #ifndef Cov2CorrVariable_INC 00040 #define Cov2CorrVariable_INC 00041 00042 #include <plearn/var/UnaryVariable.h> 00043 00044 namespace PLearn { 00045 using namespace std; 00046 00047 00048 class Cov2CorrVariable: public UnaryVariable 00049 { 00050 typedef UnaryVariable inherited; 00051 00052 public: 00053 int diagonal_choice; 00054 double epsilon; 00055 00057 Cov2CorrVariable(); 00058 00059 Cov2CorrVariable(Variable* input, int diagonal_choice_=1, 00060 double epsilon_=0, bool call_build_ = true); 00061 00062 PLEARN_DECLARE_OBJECT(Cov2CorrVariable); 00063 00064 static void declareOptions(OptionList& ol); 00065 00066 virtual void build(); 00067 00068 virtual void recomputeSize(int& l, int& w) const; 00069 virtual void fprop(); 00070 virtual void bprop(); 00072 virtual void bbprop(); 00073 virtual void symbolicBprop(); 00074 virtual void rfprop(); 00075 00076 private: 00077 00078 void build_(); 00079 00080 }; 00081 00082 DECLARE_OBJECT_PTR(Cov2CorrVariable); 00083 00084 inline Var cov2corr(Var v, int diagonal_choice=1, double epsilon=0.) 00085 { return new Cov2CorrVariable(v,diagonal_choice,epsilon); } 00086 00087 } // end of namespace PLearn 00088 00089 #endif 00090 00091 00092 /* 00093 Local Variables: 00094 mode:c++ 00095 c-basic-offset:4 00096 c-file-style:"stroustrup" 00097 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00098 indent-tabs-mode:nil 00099 fill-column:79 00100 End: 00101 */ 00102 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :