# cupy.random.rayleigh¶

cupy.random.rayleigh(scale=1.0, size=None, dtype=<class 'float'>)[source]

Rayleigh distribution.

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

$f(x) = \frac{x}{\sigma^2}e^{\frac{-x^2}{2-\sigma^2}}, x \ge 0.$
Parameters
• scale (array) – Parameter of the rayleigh distribution $$\sigma$$.

• 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 rayleigh distribution.

Return type

cupy.ndarray