PLearn 0.1
LinearARDKernel.h
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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 :
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