PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // KroneckerBaseKernel.h 00004 // 00005 // Copyright (C) 2007 Nicolas Chapados 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: Nicolas Chapados 00036 00040 #ifndef KroneckerBaseKernel_INC 00041 #define KroneckerBaseKernel_INC 00042 00043 #include <plearn/ker/MemoryCachedKernel.h> 00044 00045 namespace PLearn { 00046 00072 class KroneckerBaseKernel : public MemoryCachedKernel 00073 { 00074 typedef MemoryCachedKernel inherited; 00075 00076 public: 00077 //##### Public Build Options ############################################ 00078 00081 TVec<int> m_kronecker_indexes; 00082 00083 public: 00084 //##### Public Member Functions ######################################### 00085 00087 KroneckerBaseKernel(); 00088 00089 00090 //##### Kernel Member Functions ######################################### 00091 00093 virtual real evaluate(const Vec& x1, const Vec& x2) const; 00094 00097 virtual void computeGramMatrix(Mat K) const; 00098 00099 00100 //##### PLearn::Object Protocol ######################################### 00101 00102 // Declares other standard object methods. 00103 PLEARN_DECLARE_OBJECT(KroneckerBaseKernel); 00104 00105 // Simply calls inherited::build() then build_() 00106 virtual void build(); 00107 00109 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00110 00111 protected: 00118 mutable real m_default_value; 00119 00120 protected: 00122 static void declareOptions(OptionList& ol); 00123 00131 static real softplusFloor(real& value, real floor=1e-6); 00132 00133 private: 00135 void build_(); 00136 }; 00137 00138 // Declares a few other classes and functions related to this class 00139 DECLARE_OBJECT_PTR(KroneckerBaseKernel); 00140 00141 } // end of namespace PLearn 00142 00143 #endif 00144 00145 00146 /* 00147 Local Variables: 00148 mode:c++ 00149 c-basic-offset:4 00150 c-file-style:"stroustrup" 00151 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00152 indent-tabs-mode:nil 00153 fill-column:79 00154 End: 00155 */ 00156 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :