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) 1999-2009 Soeren Sonnenburg
00008  * Copyright (C) 1999-2009 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 
00018 namespace shogun
00019 {
00033 class CSparsePolyKernel: public CSparseKernel<float64_t>
00034 {
00035     public:
00044         CSparsePolyKernel(
00045             CSparseFeatures<float64_t>* l, CSparseFeatures<float64_t>* r,
00046             int32_t size, int32_t d, bool inhom);
00047 
00054         CSparsePolyKernel(int32_t size, int32_t degree, bool inhomogene=true);
00055 
00056         virtual ~CSparsePolyKernel();
00057 
00064         virtual bool init(CFeatures* l, CFeatures* r);
00065 
00067         virtual void cleanup();
00068 
00073         inline virtual EFeatureType get_feature_type() { return F_DREAL; }
00074 
00079         virtual EKernelType get_kernel_type() { return K_POLY; }
00080 
00085         virtual const char* get_name() const { return "SparsePoly"; }
00086 
00087     protected:
00096         virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00097 
00098     protected:
00100         int32_t degree;
00102         bool inhomogene;
00103 };
00104 }
00105 #endif /* _SPARSEPOLYKERNEL_H__ */

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