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 Sergey Lisitsyn 00008 * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society 00009 */ 00010 00011 #ifndef LAPLACIANEIGENMAPS_H_ 00012 #define LAPLACIANEIGENMAPS_H_ 00013 #include <shogun/lib/config.h> 00014 #ifdef HAVE_LAPACK 00015 #include <shogun/converter/EmbeddingConverter.h> 00016 #include <shogun/features/Features.h> 00017 #include <shogun/distance/Distance.h> 00018 00019 namespace shogun 00020 { 00021 00022 class CFeatures; 00023 class CDistance; 00024 00051 class CLaplacianEigenmaps: public CEmbeddingConverter 00052 { 00053 public: 00054 00056 CLaplacianEigenmaps(); 00057 00059 virtual ~CLaplacianEigenmaps(); 00060 00065 virtual CFeatures* apply(CFeatures* features); 00066 00071 virtual CDenseFeatures<float64_t>* embed_distance(CDistance* distance, CFeatures* features=NULL); 00072 00076 void set_k(int32_t k); 00077 00081 int32_t get_k() const; 00082 00086 void set_tau(float64_t tau); 00087 00091 float64_t get_tau() const; 00092 00094 virtual const char* get_name() const; 00095 00096 protected: 00097 00099 void init(); 00100 00105 virtual CDenseFeatures<float64_t>* construct_embedding(CFeatures* features, 00106 SGMatrix<float64_t> W_matrix); 00107 00108 protected: 00109 00111 int32_t m_k; 00112 00114 float64_t m_tau; 00115 00116 }; 00117 } 00118 00119 #endif /* HAVE_LAPACK */ 00120 #endif /* LAPLACIANEIGENMAPS_H_ */