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SVMLightOneClass.cpp
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SVMLightOneClass.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) 1999-2009 Soeren Sonnenburg
* Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
*/
#include <shogun/lib/config.h>
#ifdef USE_SVMLIGHT
#include <shogun/io/SGIO.h>
#include <shogun/mathematics/lapack.h>
#include <shogun/lib/Signal.h>
#include <shogun/labels/BinaryLabels.h>
#include <shogun/mathematics/Math.h>
#include <shogun/classifier/svm/SVMLightOneClass.h>
#include <shogun/machine/KernelMachine.h>
#include <shogun/kernel/CombinedKernel.h>
#ifndef _WIN32
#include <unistd.h>
#endif
#ifdef USE_CPLEX
extern "C" {
#include <ilcplex/cplex.h>
}
#endif
#include <shogun/base/Parallel.h>
using namespace shogun;
CSVMLightOneClass::CSVMLightOneClass(float64_t C, CKernel* k)
: CSVMLight()
{
set_C(C,C);
set_kernel(k);
}
CSVMLightOneClass::CSVMLightOneClass()
: CSVMLight()
{
}
bool CSVMLightOneClass::train_machine(CFeatures* data)
{
//certain setup params
mkl_converged=false;
verbosity=1 ;
init_margin=0.15;
init_iter=500;
precision_violations=0;
opt_precision=DEF_PRECISION;
strcpy (learn_parm->predfile, "");
learn_parm->biased_hyperplane=0;
learn_parm->sharedslack=0;
learn_parm->remove_inconsistent=0;
learn_parm->skip_final_opt_check=0;
learn_parm->svm_maxqpsize=get_qpsize();
learn_parm->svm_newvarsinqp=learn_parm->svm_maxqpsize-1;
learn_parm->maxiter=100000;
learn_parm->svm_iter_to_shrink=100;
learn_parm->svm_c=C1;
learn_parm->transduction_posratio=0.33;
learn_parm->svm_costratio=C2/C1;
learn_parm->svm_costratio_unlab=1.0;
learn_parm->svm_unlabbound=1E-5;
learn_parm->epsilon_crit=epsilon; // GU: better decrease it ... ??
learn_parm->epsilon_a=1E-15;
learn_parm->compute_loo=0;
learn_parm->rho=1.0;
learn_parm->xa_depth=0;
if (!kernel)
SG_ERROR("SVM_light can not proceed without kernel!\n")
if (data)
kernel->init(data, data);
if (!kernel->has_features())
SG_ERROR("SVM_light can not proceed without initialized kernel!\n")
int32_t num_vec=kernel->get_num_vec_lhs();
SG_INFO("num_vec=%d\n", num_vec)
SG_UNREF(m_labels);
m_labels=new CBinaryLabels(num_vec);
((CBinaryLabels*) m_labels)->set_to_one();
// in case of LINADD enabled kernels cleanup!
if (kernel->has_property(KP_LINADD) && get_linadd_enabled())
kernel->clear_normal() ;
// output some info
SG_DEBUG("threads = %i\n", parallel->get_num_threads())
SG_DEBUG("qpsize = %i\n", learn_parm->svm_maxqpsize)
SG_DEBUG("epsilon = %1.1e\n", learn_parm->epsilon_crit)
SG_DEBUG("kernel->has_property(KP_LINADD) = %i\n", kernel->has_property(KP_LINADD))
SG_DEBUG("kernel->has_property(KP_KERNCOMBINATION) = %i\n", kernel->has_property(KP_KERNCOMBINATION))
SG_DEBUG("kernel->has_property(KP_BATCHEVALUATION) = %i\n", kernel->has_property(KP_BATCHEVALUATION))
SG_DEBUG("kernel->get_optimization_type() = %s\n", kernel->get_optimization_type()==FASTBUTMEMHUNGRY ? "FASTBUTMEMHUNGRY" : "SLOWBUTMEMEFFICIENT" )
SG_DEBUG("get_solver_type() = %i\n", get_solver_type())
SG_DEBUG("get_linadd_enabled() = %i\n", get_linadd_enabled())
SG_DEBUG("get_batch_computation_enabled() = %i\n", get_batch_computation_enabled())
SG_DEBUG("kernel->get_num_subkernels() = %i\n", kernel->get_num_subkernels())
use_kernel_cache = !((kernel->get_kernel_type() == K_CUSTOM) ||
(get_linadd_enabled() && kernel->has_property(KP_LINADD)));
SG_DEBUG("use_kernel_cache = %i\n", use_kernel_cache)
if (kernel->get_kernel_type() == K_COMBINED)
{
for (index_t k_idx=0; k_idx<((CCombinedKernel*) kernel)->get_num_kernels(); k_idx++)
{
CKernel* kn = ((CCombinedKernel*) kernel)->get_kernel(k_idx);
// allocate kernel cache but clean up beforehand
kn->resize_kernel_cache(kn->get_cache_size());
SG_UNREF(kn);
}
}
kernel->resize_kernel_cache(kernel->get_cache_size());
// train the svm
svm_learn();
// brain damaged svm light work around
create_new_model(model->sv_num-1);
set_bias(-model->b);
for (int32_t i=0; i<model->sv_num-1; i++)
{
set_alpha(i, model->alpha[i+1]);
set_support_vector(i, model->supvec[i+1]);
}
// in case of LINADD enabled kernels cleanup!
if (kernel->has_property(KP_LINADD) && get_linadd_enabled())
{
kernel->clear_normal() ;
kernel->delete_optimization() ;
}
if (use_kernel_cache)
kernel->kernel_cache_cleanup();
return true ;
}
#endif //USE_SVMLIGHT