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 // Copyright (C) 2004 Olivier Delalleau 00009 00010 // Redistribution and use in source and binary forms, with or without 00011 // modification, are permitted provided that the following conditions are met: 00012 // 00013 // 1. Redistributions of source code must retain the above copyright 00014 // notice, this list of conditions and the following disclaimer. 00015 // 00016 // 2. Redistributions in binary form must reproduce the above copyright 00017 // notice, this list of conditions and the following disclaimer in the 00018 // documentation and/or other materials provided with the distribution. 00019 // 00020 // 3. The name of the authors may not be used to endorse or promote 00021 // products derived from this software without specific prior written 00022 // permission. 00023 // 00024 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 00025 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00026 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00027 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00028 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00029 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00030 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00031 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00032 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00033 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00034 // 00035 // This file is part of the PLearn library. For more information on the PLearn 00036 // library, go to the PLearn Web site at www.plearn.org 00037 00038 00039 /* ******************************************************* 00040 * $Id: BinaryClassificationLossVariable.h 3994 2005-08-25 13:35:03Z chapados $ 00041 * This file is part of the PLearn library. 00042 ******************************************************* */ 00043 00044 #ifndef BinaryClassificationLossVariable_INC 00045 #define BinaryClassificationLossVariable_INC 00046 00047 #include "BinaryVariable.h" 00048 00049 namespace PLearn { 00050 using namespace std; 00051 00052 00053 class BinaryClassificationLossVariable: public BinaryVariable 00054 { 00055 typedef BinaryVariable inherited; 00056 00057 public: 00058 00059 int class_1, class_2; 00060 real threshold; 00061 00063 BinaryClassificationLossVariable(); 00064 BinaryClassificationLossVariable(Variable* netout, Variable* classnum); 00065 00066 PLEARN_DECLARE_OBJECT(BinaryClassificationLossVariable); 00067 00068 virtual void build(); 00069 00070 virtual void recomputeSize(int& l, int& w) const; 00071 virtual void fprop(); 00073 virtual void bprop() {} 00074 00075 private: 00076 void build_(); 00077 00078 protected: 00080 static void declareOptions(OptionList& ol); 00081 00082 }; 00083 00084 DECLARE_OBJECT_PTR(BinaryClassificationLossVariable); 00085 00086 inline Var binary_classification_loss(Var network_output, Var classnum) 00087 { 00088 if (classnum->isScalar()) { 00089 return new BinaryClassificationLossVariable(network_output, classnum); 00090 } else { 00091 PLERROR("In binary_classification_loss : Can only be used with a scalar output"); 00092 // The line below is just for the compiler to stop complaining. 00093 return new BinaryClassificationLossVariable(network_output, classnum); 00094 } 00095 } 00096 00097 } // end of namespace PLearn 00098 00099 #endif 00100 00101 00102 /* 00103 Local Variables: 00104 mode:c++ 00105 c-basic-offset:4 00106 c-file-style:"stroustrup" 00107 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00108 indent-tabs-mode:nil 00109 fill-column:79 00110 End: 00111 */ 00112 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :