`scipy.stats._multivariate:dirichlet_multinomial_gen.pmf`

Signature

def pmf(self, x, alpha, n)

Probability mass function for a Dirichlet multinomial distribution.

x: ndarray: Category counts (non-negative integers). Must be broadcastable with shape parameter alpha. If multidimensional, the last axis must correspond with the categories.
alpha : array_like: The concentration parameters. The number of entries along the last axis determines the dimensionality of the distribution. Each entry must be strictly positive.
n : int or array_like: The number of trials. Each element must be a non-negative integer.