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#ifndef PYTHONIC_NUMPY_RANDOM_BINOMIAL_HPP
#define PYTHONIC_NUMPY_RANDOM_BINOMIAL_HPP
#include "pythonic/include/numpy/random/binomial.hpp"
#include "pythonic/types/ndarray.hpp"
#include "pythonic/types/numpy_expr.hpp"
#include "pythonic/types/exceptions.hpp"
PYTHONIC_NS_BEGIN
namespace numpy
{
namespace random
{
namespace details
{
inline void parameters_check(double n, double p)
{
if (n < 0)
throw pythonic::types::ValueError("n < 0");
if (p < 0)
throw pythonic::types::ValueError("p < 0");
else if (p > 1)
throw pythonic::types::ValueError("p > 1");
}
} // namespace details
template <class pS>
types::ndarray<long, pS> binomial(double n, double p, pS const &shape)
{
details::parameters_check(n, p);
types::ndarray<long, pS> result{shape, types::none_type()};
std::binomial_distribution<long> distribution{(long)n, p};
std::generate(result.fbegin(), result.fend(),
[&]() { return distribution(details::generator); });
return result;
}
inline auto binomial(double n, double p, long size)
-> decltype(binomial(n, p, types::array_tuple<long, 1>{{size}}))
{
return binomial(n, p, types::array_tuple<long, 1>{{size}});
}
inline long binomial(double n, double p, types::none_type d)
{
details::parameters_check(n, p);
return std::binomial_distribution<long>{(long)n, p}(details::generator);
}
} // namespace random
} // namespace numpy
PYTHONIC_NS_END
#endif
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