PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // LinearARDKernel.h 00004 // 00005 // Copyright (C) 2007-2009 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 LinearARDKernel_INC 00041 #define LinearARDKernel_INC 00042 00043 #include <plearn/ker/ARDBaseKernel.h> 00044 00045 namespace PLearn { 00046 00081 class LinearARDKernel : public ARDBaseKernel 00082 { 00083 typedef ARDBaseKernel inherited; 00084 00085 public: 00086 //##### Public Build Options ############################################ 00087 00088 // (No new options other than those inherited) 00089 00090 public: 00091 //##### Public Member Functions ######################################### 00092 00094 LinearARDKernel(); 00095 00096 00097 //##### Kernel Member Functions ######################################### 00098 00100 virtual real evaluate(const Vec& x1, const Vec& x2) const; 00101 00103 virtual void computeGramMatrix(Mat K) const; 00104 00107 virtual void computeGramMatrixDerivative(Mat& KD, const string& kernel_param, 00108 real epsilon=1e-6) const; 00109 00111 virtual void evaluate_all_i_x(const Vec& x, const Vec& k_xi_x, 00112 real squared_norm_of_x=-1, int istart = 0) const; 00113 00114 00115 //##### PLearn::Object Protocol ######################################### 00116 00117 // Declares other standard object methods. 00118 PLEARN_DECLARE_OBJECT(LinearARDKernel); 00119 00120 // Simply calls inherited::build() then build_() 00121 virtual void build(); 00122 00124 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00125 00126 protected: 00128 static void declareOptions(OptionList& ol); 00129 00131 real derivIspSignalSigma(int i, int j, int arg, real K) const; 00132 00134 real derivIspGlobalSigma(int i, int j, int arg, real K) const; 00135 00136 // Compute derivative w.r.t. isp_signal_sigma for WHOLE MATRIX 00137 void computeGramMatrixDerivIspSignalSigma(Mat& KD) const; 00138 00139 // Compute derivative w.r.t. isp_input_sigma[arg] for WHOLE MATRIX 00140 void computeGramMatrixDerivIspInputSigma(Mat& KD, int arg) const; 00141 00142 private: 00144 void build_(); 00145 }; 00146 00147 // Declares a few other classes and functions related to this class 00148 DECLARE_OBJECT_PTR(LinearARDKernel); 00149 00150 } // end of namespace PLearn 00151 00152 #endif 00153 00154 00155 /* 00156 Local Variables: 00157 mode:c++ 00158 c-basic-offset:4 00159 c-file-style:"stroustrup" 00160 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00161 indent-tabs-mode:nil 00162 fill-column:79 00163 End: 00164 */ 00165 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :