SkewNorm_gen.
nnlf
Return negative loglikelihood function.
Notes
This is -sum(log pdf(x, theta), axis=0) where theta are the parameters (including loc and scale).
-sum(log pdf(x, theta), axis=0)
statsmodels.sandbox.distributions.extras.SkewNorm_gen.moment
statsmodels.sandbox.distributions.extras.SkewNorm_gen.pdf