Software

Approximations for the distribution of the likelihood ratio test statistic used to test the equality of several covariance matrices

Instructions and examples for the implementation of approximations for the likelihood ratio statistic for testing the equality of several covariance matrices

Implementation of the near-exact distributions for the likelihood ratio test statistic used to test the sphericity structure of a covariance matrix

Instructions for the use of the of the codes of the near-exact distributions for the
likelihood ratio test statistic used to test the sphericity structure of a covariance
matrix.

Near-exact approximations for the product of independent Generalized Gamma random variables

Instructions for the use of the of the codes of the near-exact distributions for the
product of independent Generalized Gamma random variables

The computational implementation of the near-exact distributions for the product of independent Generalized Gamma random variables was made using the software Mathematica.

R package TestIndVars: Testing the Independence of Variables for Specific Covariance Structures.

This package allows the use of the methodology proposed in the paper: Marques, F.J., Diogo, J., Norouzirad, M., and Bispo, R. (2023). Testing the independence of variables for specific covariance structures: A simulation study, Math. Meth. Appl. Sci., 46 (9) 10421-10434.  https://doi.org/10.1002/mma.9130