discrete_range_lpmf() [1/2]

template<bool propto, typename T_y , typename T_lower , typename T_upper >

double stan::math::discrete_range_lpmf	(	const T_y &	y,
		const T_lower &	lower,
		const T_upper &	upper
	)

Return the log PMF of a discrete range for the given y, lower and upper bound (all integers).

\begin{eqnarray*} y &\sim& \mbox{\sf{discrete\_range}}(lower, upper) \\ \log(p (y \, |\, lower, upper)) &=& \log \left( \frac{1}{upper - lower + 1} \right) \\ &=& -\log (upper - lower + 1) \end{eqnarray*}

lower and upper can each be a scalar or a one-dimensional container. Any container arguments must be the same size.

Template Parameters

T_y	type of scalar, either int or std::vector<int>
T_lower	type of lower bound, either int or std::vector<int>
T_upper	type of upper bound, either int or std::vector<int>

Parameters

y	integer random variable
lower	integer lower bound
upper	integer upper bound

Returns

Log probability. If containers are supplied, returns the log sum of the probabilities.

Exceptions

std::domain_error	if upper is smaller than lower.
std::invalid_argument	if non-scalar arguments are of different sizes.

Definition at line 46 of file discrete_range_lpmf.hpp.