PLearn 0.1
IIDNoiseKernel.h
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00001 // -*- C++ -*-
00002 
00003 // IIDNoiseKernel.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 IIDNoiseKernel_INC
00041 #define IIDNoiseKernel_INC
00042 
00043 #include <plearn/ker/KroneckerBaseKernel.h>
00044 
00045 namespace PLearn {
00046 
00077 class IIDNoiseKernel : public KroneckerBaseKernel
00078 {
00079     typedef KroneckerBaseKernel inherited;
00080 
00081 public:
00082     //#####  Public Build Options  ############################################
00083 
00086     real m_isp_noise_sigma;
00087     
00090     real m_isp_kronecker_sigma;
00091     
00092 public:
00093     //#####  Public Member Functions  #########################################
00094 
00096     IIDNoiseKernel();
00097 
00098 
00099     //#####  Kernel Member Functions  #########################################
00100 
00102     virtual real evaluate(const Vec& x1, const Vec& x2) const;
00103 
00105     virtual real evaluate_i_x(int i, const Vec& x, real) const;
00106     
00109     virtual void evaluate_all_i_x(const Vec& x, const Vec& k_xi_x,
00110                                   real squared_norm_of_x=-1, int istart = 0) const;
00111 
00114     virtual void computeGramMatrix(Mat K) const;
00115     
00118     virtual void computeGramMatrixDerivative(Mat& KD, const string& kernel_param,
00119                                              real epsilon=1e-6) const;
00120 
00121     //#####  PLearn::Object Protocol  #########################################
00122 
00123     // Declares other standard object methods.
00124     PLEARN_DECLARE_OBJECT(IIDNoiseKernel);
00125 
00126     // Simply calls inherited::build() then build_()
00127     virtual void build();
00128 
00130     virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies);
00131 
00132 protected:
00134     static void declareOptions(OptionList& ol);
00135 
00138     void computeGramMatrixDerivKronecker(Mat& KD) const;
00139     
00140 private:
00142     void build_();
00143 };
00144 
00145 // Declares a few other classes and functions related to this class
00146 DECLARE_OBJECT_PTR(IIDNoiseKernel);
00147 
00148 } // end of namespace PLearn
00149 
00150 #endif
00151 
00152 
00153 /*
00154   Local Variables:
00155   mode:c++
00156   c-basic-offset:4
00157   c-file-style:"stroustrup"
00158   c-file-offsets:((innamespace . 0)(inline-open . 0))
00159   indent-tabs-mode:nil
00160   fill-column:79
00161   End:
00162 */
00163 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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