SHOGUN  3.2.1
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Isomap.cpp
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1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License as published by
4  * the Free Software Foundation; either version 3 of the License, or
5  * (at your option) any later version.
6  *
7  * Written (W) 2011-2013 Sergey Lisitsyn
8  * Copyright (C) 2011-2013 Berlin Institute of Technology and Max-Planck-Society
9  */
10 
12 #ifdef HAVE_EIGEN3
13 #include <shogun/io/SGIO.h>
14 #include <shogun/lib/Signal.h>
15 #include <shogun/lib/tapkee/tapkee_shogun.hpp>
16 
17 using namespace shogun;
18 
20 {
21  m_k = 3;
22 
23  init();
24 }
25 
27 {
28  SG_ADD(&m_k, "k", "number of neighbors", MS_AVAILABLE);
29 }
30 
32 {
33 }
34 
35 void CIsomap::set_k(int32_t k)
36 {
37  ASSERT(k>0)
38  m_k = k;
39 }
40 
41 int32_t CIsomap::get_k() const
42 {
43  return m_k;
44 }
45 
46 const char* CIsomap::get_name() const
47 {
48  return "Isomap";
49 }
50 
52 {
53  TAPKEE_PARAMETERS_FOR_SHOGUN parameters;
54  if (m_landmark)
55  {
56  parameters.method = SHOGUN_LANDMARK_ISOMAP;
57  parameters.landmark_ratio = float64_t(m_landmark_number)/distance->get_num_vec_lhs();
58  }
59  else
60  {
61  parameters.method = SHOGUN_ISOMAP;
62  }
63  parameters.n_neighbors = m_k;
64  parameters.target_dimension = m_target_dim;
65  parameters.distance = distance;
66  CDenseFeatures<float64_t>* embedding = tapkee_embed(parameters);
67  return embedding;
68 }
69 
70 #endif /* HAVE_EIGEN3 */

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