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 _SIGMOIDKERNEL_H___ 00012 #define _SIGMOIDKERNEL_H___ 00013 00014 #include "lib/common.h" 00015 #include "kernel/SimpleKernel.h" 00016 #include "features/RealFeatures.h" 00017 00023 class CSigmoidKernel: public CSimpleKernel<float64_t> 00024 { 00025 public: 00032 CSigmoidKernel(int32_t size, float64_t gamma, float64_t coef0); 00033 00042 CSigmoidKernel(CRealFeatures* l, CRealFeatures* r, int32_t size, 00043 float64_t gamma, float64_t coef0); 00044 00045 virtual ~CSigmoidKernel(); 00046 00053 virtual bool init(CFeatures* l, CFeatures* r); 00054 00056 virtual void cleanup(); 00057 00063 virtual bool load_init(FILE* src); 00064 00070 virtual bool save_init(FILE* dest); 00071 00076 virtual EKernelType get_kernel_type() { return K_SIGMOID; } 00077 00082 virtual const char* get_name() { return "Sigmoid"; } 00083 00084 protected: 00093 virtual float64_t compute(int32_t idx_a, int32_t idx_b); 00094 00095 protected: 00097 float64_t gamma; 00099 float64_t coef0; 00100 }; 00101 00102 #endif /* _SIGMOIDKERNEL_H__ */