PLearn 0.1
NeuralNetworkARDKernel.h
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00001 // -*- C++ -*-
00002 
00003 // NeuralNetworkARDKernel.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 NeuralNetworkARDKernel_INC
00041 #define NeuralNetworkARDKernel_INC
00042 
00043 #include <plearn/ker/ARDBaseKernel.h>
00044 
00045 namespace PLearn {
00046 
00080 class NeuralNetworkARDKernel : public ARDBaseKernel
00081 {
00082     typedef ARDBaseKernel inherited;
00083 
00084 public:
00085     //#####  Public Build Options  ############################################
00086 
00087     // (No new options other than those inherited)
00088     
00089 public:
00090     //#####  Public Member Functions  #########################################
00091 
00093     NeuralNetworkARDKernel();
00094 
00095 
00096     //#####  Kernel Member Functions  #########################################
00097 
00099     virtual real evaluate(const Vec& x1, const Vec& x2) const;
00100 
00102     virtual void computeGramMatrix(Mat K) const;
00103     
00106     virtual void computeGramMatrixDerivative(Mat& KD, const string& kernel_param,
00107                                              real epsilon=1e-6) const;
00108     
00110     virtual void evaluate_all_i_x(const Vec& x, const Vec& k_xi_x,
00111                                   real squared_norm_of_x=-1, int istart = 0) const;
00112 
00113     
00114     //#####  PLearn::Object Protocol  #########################################
00115 
00116     // Declares other standard object methods.
00117     PLEARN_DECLARE_OBJECT(NeuralNetworkARDKernel);
00118 
00119     // Simply calls inherited::build() then build_()
00120     virtual void build();
00121 
00123     virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies);
00124 
00125 protected:
00127     static void declareOptions(OptionList& ol);
00128 
00130     real derivIspGlobalSigma(int i, int j, int arg, real K) const;
00131     
00132     // Compute derivative w.r.t. isp_signal_sigma for WHOLE MATRIX
00133     void computeGramMatrixDerivIspSignalSigma(Mat& KD) const;
00134     
00135     // Compute derivative w.r.t. isp_input_sigma[arg] for WHOLE MATRIX
00136     void computeGramMatrixDerivIspInputSigma(Mat& KD, int arg) const;
00137     
00138 private:
00140     void build_();
00141 };
00142 
00143 // Declares a few other classes and functions related to this class
00144 DECLARE_OBJECT_PTR(NeuralNetworkARDKernel);
00145 
00146 } // end of namespace PLearn
00147 
00148 #endif
00149 
00150 
00151 /*
00152   Local Variables:
00153   mode:c++
00154   c-basic-offset:4
00155   c-file-style:"stroustrup"
00156   c-file-offsets:((innamespace . 0)(inline-open . 0))
00157   indent-tabs-mode:nil
00158   fill-column:79
00159   End:
00160 */
00161 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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