cupy.random.wald#

cupy.random.wald(mean, scale, size=None, dtype=<class 'float'>)[source]#

Wald distribution.

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

\[f(x) = \sqrt{\frac{\lambda}{2\pi x^3}}\ e^{\frac{-\lambda(x-\mu)^2}{2\mu^2x}}.\]

Parameters:

mean (float) – Parameter of the wald distribution \(\mu\).
scale (float) – Parameter of the wald distribution \(\lambda\).
size (int or tuple of ints) – The shape of the array. If None, a zero-dimensional array is generated.
dtype – Data type specifier. Only numpy.float32 and numpy.float64 types are allowed.

Returns:

Samples drawn from the wald distribution.

Return type:

cupy.ndarray