PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // PLearnerDiagonalKernel.h 00004 // 00005 // Copyright (C) 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 MATERN1ARDKERNEL_INC 00041 #define MATERN1ARDKERNEL_INC 00042 00043 #include <plearn/ker/KroneckerBaseKernel.h> 00044 #include <plearn_learners/generic/PLearner.h> 00045 00046 namespace PLearn { 00047 00061 class PLearnerDiagonalKernel : public KroneckerBaseKernel 00062 { 00063 typedef KroneckerBaseKernel inherited; 00064 00065 public: 00066 //##### Public Build Options ############################################ 00067 00069 PP<PLearner> m_learner; 00070 00072 mutable real m_isp_signal_sigma; 00073 00074 public: 00075 //##### Public Member Functions ######################################### 00076 00078 PLearnerDiagonalKernel(); 00079 00080 00081 //##### Kernel Member Functions ######################################### 00082 00084 virtual real evaluate(const Vec& x1, const Vec& x2) const; 00085 00087 virtual void computeGramMatrix(Mat K) const; 00088 00091 virtual void computeGramMatrixDerivative(Mat& KD, const string& kernel_param, 00092 real epsilon=1e-6) const; 00093 00095 virtual void evaluate_all_i_x(const Vec& x, const Vec& k_xi_x, 00096 real squared_norm_of_x=-1, int istart = 0) const; 00097 00098 00099 //##### PLearn::Object Protocol ######################################### 00100 00101 // Declares other standard object methods. 00102 PLEARN_DECLARE_OBJECT(PLearnerDiagonalKernel); 00103 00104 // Simply calls inherited::build() then build_() 00105 virtual void build(); 00106 00108 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00109 00110 protected: 00112 static void declareOptions(OptionList& ol); 00113 00115 void computeGramMatrixDerivIspSignalSigma(Mat& KD) const; 00116 00117 private: 00119 void build_(); 00120 00121 private: 00123 mutable Vec m_output_buffer; 00124 }; 00125 00126 // Declares a few other classes and functions related to this class 00127 DECLARE_OBJECT_PTR(PLearnerDiagonalKernel); 00128 00129 } // end of namespace PLearn 00130 00131 #endif 00132 00133 00134 /* 00135 Local Variables: 00136 mode:c++ 00137 c-basic-offset:4 00138 c-file-style:"stroustrup" 00139 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00140 indent-tabs-mode:nil 00141 fill-column:79 00142 End: 00143 */ 00144 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :