Each R package should include ../../math/R/Makefile.extension, which also
defines MASTER_SITES. Consequently, it is redundant for the individual
packages to do the same. Package-specific definitions also prevent
redefining MASTER_SITES in a single common place.
coda provides functions for summarizing and plotting the output from
Markov Chain Monte Carlo (MCMC) simulations, as well as diagnostic
tests of convergence to the equilibrium distribution of the Markov
chain.