logsumexp_streaming()

double logsumexp_streaming	(	double &	_alpha,
		double &	_r,
		const double &	weight
	)

streaming logsumexp computation, see https://arxiv.org/abs/1805.02867

Parameters

_alpha	running maximum for normalization
_r	the sum term while controlling for the maximum
weight	the most recent (log) weight

Returns

double