SparseGaussianKernel.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 _SPARSEGAUSSIANKERNEL_H___
00012 #define _SPARSEGAUSSIANKERNEL_H___
00013 
00014 #include "lib/common.h"
00015 #include "kernel/SparseKernel.h"
00016 #include "features/SparseFeatures.h"
00017 
00029 class CSparseGaussianKernel: public CSparseKernel<float64_t>
00030 {
00031     public:
00037         CSparseGaussianKernel(int32_t size, float64_t width);
00038 
00045         CSparseGaussianKernel(
00046             CSparseFeatures<float64_t>* l, CSparseFeatures<float64_t>* r,
00047             float64_t width);
00048 
00049         virtual ~CSparseGaussianKernel();
00050 
00057         virtual bool init(CFeatures* l, CFeatures* r);
00058 
00060         virtual void cleanup();
00061 
00067         virtual bool load_init(FILE* src);
00068 
00074         virtual bool save_init(FILE* dest);
00075 
00080         virtual EKernelType get_kernel_type() { return K_SPARSEGAUSSIAN; }
00081 
00086         inline virtual EFeatureType get_feature_type() { return F_DREAL; }
00087 
00092         virtual const char* get_name() const { return "SparseGaussian"; }
00093 
00094     protected:
00103         virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00104 
00105     protected:
00107         float64_t width;
00109         float64_t* sq_lhs;
00111         float64_t* sq_rhs;
00112 };
00113 
00114 #endif /* _SPARSEGAUSSIANKERNEL_H__ */

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