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. Samples drawn from the poisson distribution. cupy.ndarray