idealToMCMC function

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)

Arguments

• 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.

Returns

A mcmc object as used by the coda package, starting at iteration start, drawn from the x component of the ideal object.

Note

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.

See Also

ideal, mcmc

Examples

data(s109)
f = system.file("extdata",package="pscl","id1.rda")
load(f)
id1coda <- idealToMCMC(id1)
summary(id1coda)