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 00047 class CLaplacianEigenmaps: public CEmbeddingConverter 00048 { 00049 public: 00050 00052 CLaplacianEigenmaps(); 00053 00055 virtual ~CLaplacianEigenmaps(); 00056 00061 virtual CFeatures* apply(CFeatures* features); 00062 00067 virtual CSimpleFeatures<float64_t>* embed_distance(CDistance* distance, CFeatures* features=NULL); 00068 00072 void set_k(int32_t k); 00073 00077 int32_t get_k() const; 00078 00082 void set_tau(float64_t tau); 00083 00087 float64_t get_tau() const; 00088 00090 virtual const char* get_name() const; 00091 00092 protected: 00093 00095 void init(); 00096 00101 virtual CSimpleFeatures<float64_t>* construct_embedding(CFeatures* features, 00102 SGMatrix<float64_t> W_matrix); 00103 00104 protected: 00105 00107 int32_t m_k; 00108 00110 float64_t m_tau; 00111 00112 }; 00113 } 00114 00115 #endif /* HAVE_LAPACK */ 00116 #endif /* LAPLACIANEIGENMAPS_H_ */