PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // SquaredExponentialARDKernel.h 00004 // 00005 // Copyright (C) 2006-2007 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 SquaredExponentialARDKernel_INC 00041 #define SquaredExponentialARDKernel_INC 00042 00043 #include <plearn/ker/ARDBaseKernel.h> 00044 00045 namespace PLearn { 00046 00086 class SquaredExponentialARDKernel : public ARDBaseKernel 00087 { 00088 typedef ARDBaseKernel inherited; 00089 00090 public: 00091 //##### Public Build Options ############################################ 00092 00093 // (No new options other than those inherited) 00094 00095 public: 00096 //##### Public Member Functions ######################################### 00097 00099 SquaredExponentialARDKernel(); 00100 00101 00102 //##### Kernel Member Functions ######################################### 00103 00105 virtual real evaluate(const Vec& x1, const Vec& x2) const; 00106 00108 virtual void computeGramMatrix(Mat K) const; 00109 00112 virtual void computeGramMatrixDerivative(Mat& KD, const string& kernel_param, 00113 real epsilon=1e-6) const; 00114 00116 virtual void evaluate_all_i_x(const Vec& x, const Vec& k_xi_x, 00117 real squared_norm_of_x=-1, int istart = 0) const; 00118 00119 00120 //##### PLearn::Object Protocol ######################################### 00121 00122 // Declares other standard object methods. 00123 PLEARN_DECLARE_OBJECT(SquaredExponentialARDKernel); 00124 00125 // Simply calls inherited::build() then build_() 00126 virtual void build(); 00127 00129 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00130 00131 protected: 00133 static void declareOptions(OptionList& ol); 00134 00136 real derivIspSignalSigma(int i, int j, int arg, real K) const; 00137 00139 real derivIspGlobalSigma(int i, int j, int arg, real K) const; 00140 00141 // Compute derivative w.r.t. isp_signal_sigma for WHOLE MATRIX 00142 void computeGramMatrixDerivIspSignalSigma(Mat& KD) const; 00143 00144 // Compute derivative w.r.t. isp_input_sigma[arg] for WHOLE MATRIX 00145 void computeGramMatrixDerivIspInputSigma(Mat& KD, int arg) const; 00146 00147 private: 00149 void build_(); 00150 }; 00151 00152 // Declares a few other classes and functions related to this class 00153 DECLARE_OBJECT_PTR(SquaredExponentialARDKernel); 00154 00155 } // end of namespace PLearn 00156 00157 #endif 00158 00159 00160 /* 00161 Local Variables: 00162 mode:c++ 00163 c-basic-offset:4 00164 c-file-style:"stroustrup" 00165 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00166 indent-tabs-mode:nil 00167 fill-column:79 00168 End: 00169 */ 00170 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :