[fix] docstring equation
@@ -397,10 +397,10 @@ def rayleigh(scale=1.0, size=None, dtype=float):
Its probability density function is defined as
.. math::
- f(x) = \\frac{x}{scale^2}e^{\\frac{-x^2}{2-scale^2}},
+ f(x) = \\frac{x}{\\sigma^2}e^{\\frac{-x^2}{2-\\sigma^2}},
Args:
- scale (array): Parameter of the rayleigh distribution :math:`scale`.
+ scale (array): Parameter of the rayleigh distribution :math:`\\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 :class:`numpy.float32` and
