SHOGUN
v3.2.0
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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) 2011-2013 Sergey Lisitsyn 00008 * Copyright (C) 2011-2013 Berlin Institute of Technology and Max-Planck-Society 00009 */ 00010 00011 #include <shogun/converter/Isomap.h> 00012 #ifdef HAVE_EIGEN3 00013 #include <shogun/io/SGIO.h> 00014 #include <shogun/lib/Signal.h> 00015 #include <shogun/lib/tapkee/tapkee_shogun.hpp> 00016 00017 using namespace shogun; 00018 00019 CIsomap::CIsomap() : CMultidimensionalScaling() 00020 { 00021 m_k = 3; 00022 00023 init(); 00024 } 00025 00026 void CIsomap::init() 00027 { 00028 SG_ADD(&m_k, "k", "number of neighbors", MS_AVAILABLE); 00029 } 00030 00031 CIsomap::~CIsomap() 00032 { 00033 } 00034 00035 void CIsomap::set_k(int32_t k) 00036 { 00037 ASSERT(k>0) 00038 m_k = k; 00039 } 00040 00041 int32_t CIsomap::get_k() const 00042 { 00043 return m_k; 00044 } 00045 00046 const char* CIsomap::get_name() const 00047 { 00048 return "Isomap"; 00049 } 00050 00051 CDenseFeatures<float64_t>* CIsomap::embed_distance(CDistance* distance) 00052 { 00053 TAPKEE_PARAMETERS_FOR_SHOGUN parameters; 00054 if (m_landmark) 00055 { 00056 parameters.method = SHOGUN_LANDMARK_ISOMAP; 00057 parameters.landmark_ratio = float64_t(m_landmark_number)/distance->get_num_vec_lhs(); 00058 } 00059 else 00060 { 00061 parameters.method = SHOGUN_ISOMAP; 00062 } 00063 parameters.n_neighbors = m_k; 00064 parameters.target_dimension = m_target_dim; 00065 parameters.distance = distance; 00066 CDenseFeatures<float64_t>* embedding = tapkee_embed(parameters); 00067 return embedding; 00068 } 00069 00070 #endif /* HAVE_EIGEN3 */