## [5a5422]: man / adapt.Rd  Maximize  Restore  History

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 \name{adapt} \alias{adapt} \title{Adaptive phase for JAGS models} \description{ A \code{jags} object represents a Bayesian graphical model described using the BUGS language. } \usage{ adapt(object, n.iter, \dots) } \arguments{ \item{object}{a \code{jags} model object} \item{n.iter}{length of the adaptive phase} \item{\ldots}{additional arguments to the update method} } \value{ This function modifies the original object and returns \code{NULL} } \details{ This function is not normally called by the user. When a JAGS model is compiled, it may require an initial sampling phase during which the samplers adapt their parameters to maximize their efficiency. The sequence of samples generated during this adaptive phase is not a Markov chain, and therefore may not be used for posterior inference on the model. For this reason, the \code{adapt} function must be called before samples can be generated from the model using the \code{update} method. Normally, this is done by the \code{jags.model} function when the model object is created. The \code{adapt} function can only be called once on a jags model object since it turns off the adaptive phase. Subsequent calls to \code{adapt} do nothing. } \author{Martyn Plummer} \keyword{models}