If stability
, skewness
, scale
and location
are not specified they assume the default values of 2, 0, 1 and 0, respectively.
The Stable distribution with parameters stability =
\(\alpha\),
skewness =
\(\beta\), scale =
\(c\) and location =
\(\mu\)
doesn't have an analytically expressible probability density function, except for some parameter values.
The parameters have conditions : \(0 < \alpha \le 2\), \(-1 \le \beta \le 1\) and \(c > 0\).
The mean of Stable distribution is defined \(\mu\) when \(\alpha > 1\), otherwise undefined.
The variance of Stable distribution is defined \(2 c^2\) when \(\alpha = 2\), otherwise infinite.