VITA and IG Simulation for Given Covariance and Marginals
User specifies population covariance matrix. Marginal information may be fully
specified, for which the package implements the VITA (VIne-To-Anything) algorithm.
Groenneberg and Foldnes (2017) .
Alternatively, marginal skewness and kurtosis may be specified, for which the package
implements the IG (independent generator) algorithm. Foldnes and Olsson (2016) .