1 #ifndef STAN_MATH_PRIM_MAT_PROB_MULTINOMIAL_RNG_HPP 2 #define STAN_MATH_PRIM_MAT_PROB_MULTINOMIAL_RNG_HPP 15 const Eigen::Matrix<double, Eigen::Dynamic, 1>& theta,
int N, RNG& rng) {
16 static const char*
function =
"multinomial_rng";
21 std::vector<int> result(theta.size(), 0);
22 double mass_left = 1.0;
24 for (
int k = 0; n_left > 0 && k < theta.size(); ++k) {
25 double p = theta[k] / mass_left;
30 mass_left -= theta[k];
void check_simplex(const char *function, const char *name, const Eigen::Matrix< T_prob, Eigen::Dynamic, 1 > &theta)
Check if the specified vector is simplex.
std::vector< int > multinomial_rng(const Eigen::Matrix< double, Eigen::Dynamic, 1 > &theta, int N, RNG &rng)
VectorBuilder< true, int, T_N, T_theta >::type binomial_rng(const T_N &N, const T_theta &theta, RNG &rng)
Return a pseudorandom binomial random variable for the given population size and chance of success pa...
void check_positive(const char *function, const char *name, const T_y &y)
Check if y is positive.