SparsePolyKernel.h

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00001 /*
00002  * This program is free software; you can redistribute it and/or modify
00003  * it under the terms of the GNU General Public License as published by
00004  * the Free Software Foundation; either version 3 of the License, or
00005  * (at your option) any later version.
00006  *
00007  * Written (W) 1999-2008 Soeren Sonnenburg
00008  * Copyright (C) 1999-2008 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _SPARSEPOLYKERNEL_H___
00012 #define _SPARSEPOLYKERNEL_H___
00013 
00014 #include "lib/common.h"
00015 #include "kernel/SparseKernel.h"
00016 #include "features/SparseFeatures.h"
00017 
00028 class CSparsePolyKernel: public CSparseKernel<DREAL>
00029 {
00030     public:
00040         CSparsePolyKernel(
00041             CSparseFeatures<DREAL>* l, CSparseFeatures<DREAL>* r,
00042             INT size, INT d, bool inhom, bool use_norm);
00043 
00051         CSparsePolyKernel(INT size, INT degree,
00052             bool inhomogene=true, bool use_normalization=true);
00053 
00054         virtual ~CSparsePolyKernel();
00055 
00062         virtual bool init(CFeatures* l, CFeatures* r);
00063 
00065         virtual void cleanup();
00066 
00072         virtual bool load_init(FILE* src);
00073 
00079         virtual bool save_init(FILE* dest);
00080 
00085         inline virtual EFeatureType get_feature_type() { return F_DREAL; }
00086 
00091         virtual EKernelType get_kernel_type() { return K_POLY; }
00092 
00097         virtual const CHAR* get_name() { return "SparsePoly"; }
00098 
00099     protected:
00108         virtual DREAL compute(INT idx_a, INT idx_b);
00109 
00110     protected:
00112         INT degree;
00114         bool inhomogene;
00116         bool use_normalization;
00117 
00119         DREAL *sqrtdiag_lhs;
00121         DREAL *sqrtdiag_rhs;
00123         bool initialized;
00124 };
00125 
00126 #endif /* _SPARSEPOLYKERNEL_H__ */

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