random_df generates random M2 degrees of freedom parameter values, where
M2 is number of StMVAR type regimes in the model-
random_df(M, model = c("GMVAR", "StMVAR", "G-StMVAR"))a numeric vector of length zero.
a numeric vector of length M with random entries strictly larger than two.
a numeric vector of length M2 with random entries strictly larger than two.
a positive integer specifying the number of mixture components.
a size \((2\times 1)\) integer vector specifying the number of GMVAR type components M1
in the first element and StMVAR type components M2 in the second element. The total number of mixture components
is M=M1+M2.
is "GMVAR", "StMVAR", or "G-StMVAR" model considered? In the G-StMVAR model, the first M1 components
are GMVAR type and the rest M2 components are StMVAR type.