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) 2011 Soeren Sonnenburg 00008 * Copyright (C) 2011 Berlin Institute of Technology 00009 */ 00010 00011 #ifndef KERNELPCA_H__ 00012 #define KERNELPCA_H__ 00013 #include <shogun/lib/config.h> 00014 #ifdef HAVE_LAPACK 00015 00016 #include <shogun/preprocessor/DimensionReductionPreprocessor.h> 00017 #include <shogun/features/Features.h> 00018 #include <shogun/kernel/Kernel.h> 00019 #include <shogun/lib/common.h> 00020 00021 namespace shogun 00022 { 00023 00024 class CFeatures; 00025 class CKernel; 00026 00035 class CKernelPCA: public CDimensionReductionPreprocessor 00036 { 00037 public: 00040 CKernelPCA(); 00041 00045 CKernelPCA(CKernel* k); 00046 00047 virtual ~CKernelPCA(); 00048 00050 virtual bool init(CFeatures* features); 00052 virtual void cleanup(); 00053 00057 virtual SGMatrix<float64_t> apply_to_feature_matrix(CFeatures* features); 00058 00061 virtual SGVector<float64_t> apply_to_feature_vector(SGVector<float64_t> vector); 00062 00066 virtual CDenseFeatures<float64_t>* apply_to_string_features(CFeatures* features); 00067 00071 SGMatrix<float64_t> get_transformation_matrix() const 00072 { 00073 return m_transformation_matrix; 00074 } 00075 00079 SGVector<float64_t> get_bias_vector() const 00080 { 00081 return m_bias_vector; 00082 } 00083 00085 virtual const char* get_name() const { return "KernelPCA"; } 00086 00088 virtual EPreprocessorType get_type() const { return P_KERNELPCA; } 00089 00090 protected: 00091 00093 void init(); 00094 00095 protected: 00096 00098 CFeatures* m_init_features; 00099 00101 SGMatrix<float64_t> m_transformation_matrix; 00102 00104 SGVector<float64_t> m_bias_vector; 00105 00107 bool m_initialized; 00108 00109 }; 00110 } 00111 #endif 00112 #endif