Plot the bivariate PDF of the Normal Inverse Gamma Distribution.

plotNormalInvGamma(mu, lambda, alpha, beta)

Arguments

mu	\(\mu\) parameter of the Normal Inverse Gamma distribution.
lambda	\(\lambda\) parameter of the Normal Inverse Gamma distribution.
alpha	\(\alpha\) parameter of the Normal Inverse Gamma distribution.
beta	\(\beta\) parameter of the Normal Inverse Gamma distribution.

Value

The PDF of NormalInverseGamma(mu, lambda, alpha, beta)

Note

This is a bivariate distribution (commonly used to model mean and variance of the normal distribution) and returns a 2d contour plot instead of a typical one dimensional PDF. You may want to experiment with both this distribution and the plotNormal and plotInvGamma outputs separately before arriving at a suitable set of priors for the Normal and LogNormal bayesTest.

Examples

plotNormalInvGamma(3, 1, 1, 1)