Introduction - If you have any usage issues, please Google them yourself
function [f, g] = dggbeta(beta, absx)
DGGBETA Derivative of generalized Gaussian pdf with respective to beta
[F, G] = DGGBETA(BETA, ABSX)
Return partial derivative and second order partial derivative
This is an utility function for GGMLE
ABSX is the distance of the data from the mean
Function is undefined for negative beta
if beta <= 0
f = NaN
g = NaN