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ManifoldSculpting.cpp
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ManifoldSculpting.cpp
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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Written (W) 2013 Vladyslav S. Gorbatiuk
* Copyright (C) 2011-2013 Vladyslav S. Gorbatiuk
*/
#include <shogun/converter/ManifoldSculpting.h>
#ifdef HAVE_EIGEN3
#include <shogun/lib/tapkee/tapkee_shogun.hpp>
#include <shogun/features/DenseFeatures.h>
#include <shogun/distance/EuclideanDistance.h>
using namespace shogun;
CManifoldSculpting::CManifoldSculpting() :
CEmbeddingConverter()
{
// Default values
m_k = 10;
m_squishing_rate = 0.8;
m_max_iteration = 80;
init();
}
void CManifoldSculpting::init()
{
SG_ADD(&m_k, "k", "number of neighbors", MS_NOT_AVAILABLE);
SG_ADD(&m_squishing_rate, "quishing_rate",
"squishing rate",MS_NOT_AVAILABLE);
SG_ADD(&m_max_iteration, "max_iteration",
"maximum number of algorithm's iterations", MS_NOT_AVAILABLE);
}
CManifoldSculpting::~CManifoldSculpting()
{
}
const char* CManifoldSculpting::get_name() const
{
return "ManifoldSculpting";
}
void CManifoldSculpting::set_k(const int32_t k)
{
ASSERT(k>0)
m_k = k;
}
int32_t CManifoldSculpting::get_k() const
{
return m_k;
}
void CManifoldSculpting::set_squishing_rate(const float64_t squishing_rate)
{
ASSERT(squishing_rate >= 0 && squishing_rate < 1)
m_squishing_rate = squishing_rate;
}
float64_t CManifoldSculpting::get_squishing_rate() const
{
return m_squishing_rate;
}
void CManifoldSculpting::set_max_iteration(const int32_t max_iteration)
{
ASSERT(max_iteration > 0)
m_max_iteration = max_iteration;
}
int32_t CManifoldSculpting::get_max_iteration() const
{
return m_max_iteration;
}
CFeatures* CManifoldSculpting::apply(CFeatures* features)
{
CDenseFeatures<float64_t>* feats = (CDenseFeatures<float64_t>*)features;
SG_REF(feats);
CDistance* euclidean_distance =
new CEuclideanDistance(feats, feats);
TAPKEE_PARAMETERS_FOR_SHOGUN parameters;
parameters.n_neighbors = m_k;
parameters.squishing_rate = m_squishing_rate;
parameters.max_iteration = m_max_iteration;
parameters.features = feats;
parameters.distance = euclidean_distance;
parameters.method = SHOGUN_MANIFOLD_SCULPTING;
parameters.target_dimension = m_target_dim;
CDenseFeatures<float64_t>* embedding = tapkee_embed(parameters);
SG_UNREF(euclidean_distance);
return embedding;
}
#endif /* HAVE_EIGEN */