sort_cols_sparsity()

template<typename Scalar >

void syten::sort_cols_sparsity	(	DenseTensor< 2, Scalar > &	a,
		DenseTensor< 2, Scalar > &	p
	)

Sorts the columns of a in-place to have the sparsest columns first.

Sparsity is measured by a number of sparsity points. 1 point for each element exactly 0 and 0.1 point for each element under SYTEN_SMALL_THRESHOLD. Scale columns to have the similar 2-norm first, otherwise the second point makes no sense.

References syten::Deparallelise::cols(), syten::Cuda::copy(), syten::DenseTensor< rank, Scalar >::dim(), syten::DenseTensor< rank, Scalar >::getDims(), std::move(), std::sort(), SYTEN_SMALL_THRESHOLD, and underThreshold().

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