The qpower returns the density at point x for the
Exponential Power distribution with parameters \(a\), \(b\) and \(m\).
qpower(x, m = 0, a = 1, b = 2)a vector containing the values for the densities.
(numeric) - value in the range \((-\infty, \infty)\) to evaluate the density.
(numeric) - location parameter. Must be in the range
(numeric) - scale parameter. Must be in the range \((0, \infty)\).
(numeric) - shape parameter. Must be in the range \((0, \infty)\). \((-\infty, \infty)\).
The Exponential Power distribution (EP) is given by the function: $$ f(a,b) = \frac{1}{2a\Gamma(1+1/b)}e^{-|(x-m)/a|^b}, -\infty < x < \infty $$. where \(b\) is a shape parameter, \(a\) is a scale parameter, \(m\) is a location parameter and \(\Gamma\) represents the gamma function.