◆ operator()()

template<typename ThetaVec , typename Eta , typename Mean , require_all_eigen_vector_t< ThetaVec > * = nullptr>

auto stan::math::neg_binomial_2_log_likelihood::operator()	(	const ThetaVec &	theta,
		const Eta &	eta,
		const std::vector< int > &	y,
		const std::vector< int > &	y_index,
		Mean &&	mean,
		std::ostream *	pstream
	)		const

inline

Returns the lpmf for a negative binomial (2nd parameterization, log link) across multiple groups.

The dispersion eta is either a scalar shared by all groups or a vector with one entry per group.