convert an object of class ideal to a coda MCMC object
Converts the x element of an ideal
object to an MCMC object,
as used in the coda package.
idealToMCMC(object, burnin=NULL)
When specifying a value of burnin
different from that used
in fitting the ideal
object, note a distinction
between the iteration numbers of the stored iterations, and the
number of stored iterations. That is, the n
-th iteration
stored in an ideal
object will not be iteration
n
if the user specified thin>1
in the call to
ideal
. Here, iterations are tagged with their
iteration number. Thus, if the user called ideal
with
thin=10
and burnin=100
then the stored iterations are
numbered 100, 110, 120, ...
. Any future subsetting via a
burnin
refers to this iteration number.
data(s109) f = system.file("extdata",package="pscl","id1.rda") load(f) id1coda <- idealToMCMC(id1) summary(id1coda)
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