Character indicating what parameters to plot. Possible values
are "sd" or "var" which gives plots for the variance
components (on the sd. scale), "beta" or "slope", which gives
plots for slope parameters and "alpha" or "int", which gives
plots for the intercept parameters.
scales
Character vector of length two, with possible values "same" or
"free", indicating whether x- and y-axes of the plots should be constrained
to be the same across panels. For pairs only the first element is
used to decide whether all panles should have the same axes.
layout
Character. If "col" parameters are displayed columnwise
by method, if "row" they are displayed row-wise.
aspect
How should the panels be scaled. Default ("fill") is to
make a panels take up as much place as possible.
A Lattice plot is returned, which means that it must printed
when these functions are called in a batch program or inside another
function or for-loop.
trace plots traces of the sampled chains, post plots posterior
densities of the parameters and pairs plots a scatter-plot matrix of
bivariate marginal posterior distributions.