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.. _continuous-rdist:
R-distribution Distribution
===========================
A general-purpose distribution with a variety of shapes controlled by :math:`c>0.` Range of standard distribution is :math:`x\in\left[-1,1\right]`
.. math::
:nowrap:
\begin{eqnarray*} f\left(x;c\right) & = & \frac{\left(1-x^{2}\right)^{c/2-1}}{B\left(\frac{1}{2},\frac{c}{2}\right)}\\ F\left(x;c\right) & = & \frac{1}{2}+\frac{x}{B\left(\frac{1}{2},\frac{c}{2}\right)}\,_{2}F_{1}\left(\frac{1}{2},1-\frac{c}{2};\frac{3}{2};x^{2}\right)\end{eqnarray*}
.. math::
\mu_{n}^{\prime}=\frac{\left(1+\left(-1\right)^{n}\right)}{2}B\left(\frac{n+1}{2},\frac{c}{2}\right)
The R-distribution with parameter :math:`n` is the distribution of the correlation coefficient of a random sample
of size :math:`n` drawn from a bivariate normal distribution with :math:`\rho=0.` The mean of the standard distribution is always zero and as the sample
size grows, the distribution's mass concentrates more closely about
this mean.
Implementation: `scipy.stats.rdist`
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