varnames() returns the variable names and chanames
returns the chain names, or NULL if these are not set. If allow.null = FALSE then NULL values will be
replaced with canonical names.
varnames(x, allow.null=TRUE)
chanames(x, allow.null=TRUE)
varnames(x) <- value
chanames(x) <- valuemcmc or mcmc.list objectmcmc,
mcmc.list.