Beispiel #1
0
inline boost::shared_ptr< Base > Construct(
	std::vector< t_OriginalVectorType >& vectors,
	std::vector< double >& labels,
	unsigned int const trainingSize,
	std::vector< std::string > const& kernelParameters,
	unsigned int const cacheSize = 0
)
{
	uint64_t sparseSize = 0;
	if ( t_Traits::SPARSE_ALLOWED ) {

		typename std::vector< SparseVector< t_Type > >::const_iterator ii    = vectors.begin();
		typename std::vector< SparseVector< t_Type > >::const_iterator iiEnd = vectors.end();
		for ( ; ii != iiEnd; ++ii )
			sparseSize += ii->Size();
	}

	uint64_t spanSize = 0;
	if ( t_Traits::SPAN_ALLOWED ) {

		typename std::vector< SparseVector< t_Type > >::const_iterator ii    = vectors.begin();
		typename std::vector< SparseVector< t_Type > >::const_iterator iiEnd = vectors.end();
		for ( ; ii != iiEnd; ++ii )
			spanSize += SpanVector< t_Type >( *ii ).Size();
	}

	uint64_t denseSize = 0;
	{	typename std::vector< SparseVector< t_Type > >::const_iterator ii    = vectors.begin();
		typename std::vector< SparseVector< t_Type > >::const_iterator iiEnd = vectors.end();
		for ( ; ii != iiEnd; ++ii )
			denseSize += DenseVector< t_Type >( *ii ).Size();
	}

	boost::shared_ptr< Base > result;

	if (
		t_Traits::SPARSE_ALLOWED &&
		( ( ! t_Traits::SPAN_ALLOWED ) || ( sparseSize <= spanSize ) ) &&
		( sparseSize <= denseSize )
	)
	{
		result = boost::shared_ptr< Base >( new t_KernelType< SparseVector< t_Type >, t_Traits >( vectors, labels, trainingSize, kernelParameters, cacheSize ) );
	}
	else if (
		t_Traits::SPAN_ALLOWED &&
		( spanSize <= denseSize )
	)
	{
		result = boost::shared_ptr< Base >( new t_KernelType< SpanVector< t_Type >, t_Traits >( vectors, labels, trainingSize, kernelParameters, cacheSize ) );
	}
	else {

		result = boost::shared_ptr< Base >( new t_KernelType< DenseVector< t_Type >, t_Traits >( vectors, labels, trainingSize, kernelParameters, cacheSize ) );
	}

	return result;
}