idealToMCMC {pscl} | R Documentation |
Converts the x element of an ideal
object to an MCMC object,
as used in the coda
package.
idealToMCMC(object, burnin=NULL)
object |
an object of class ideal . |
burnin |
of the recorded MCMC samples, how many to discard as
burnin? Default is NULL , in which case the value of
burnin in the ideal object is used. |
A mcmc
object as used by the
coda
package, starting at
iteration start
, drawn from the x
component of the
ideal
object.
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) id1 <- ideal(s109, d=1, normalize=TRUE, maxiter=1100, ## short run for demo purposes burnin=100, thin=10) id1coda <- idealToMCMC(id1) summary(id1coda)