cupy.random.poisson

cupy.random.poisson(lam=1.0, size=None, dtype=<class 'int'>)[source]

Poisson distribution.

Returns an array of samples drawn from the poisson distribution. Its probability mass function is defined as

\[f(x) = \frac{\lambda^xe^{-\lambda}}{k!}.\]
Parameters
  • lam (array_like of floats) – Parameter of the poisson distribution \(\lambda\).

  • size (int or tuple of ints) – The shape of the array. If None, this function generate an array whose shape is lam.shape.

  • dtype – Data type specifier. Only numpy.int32 and numpy.int64 types are allowed.

Returns

Samples drawn from the poisson distribution.

Return type

cupy.ndarray

See also

numpy.random.poisson