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