package R2WinBUGS question; was: Multilevel
Uwe Ligges <ligges <at> statistik.tu-dortmund.de> writes:
On 29.01.2011 15:06, martanair wrote:
[snip]
I write:
radon.data<- list ("n", "J", "x", "y", "county")
radon.inits<- function (){
list (a=rnorm(J), b=rnorm(1), mu.a=rnorm(1),
sigma.y=runif(1), sigma.a=runif(1))
}
radon.parameters<- c ("a", "b", "mu.a", "sigma.y", "sigma.a")
[snip]
# with 500 iterations
radon.bugs.1<- bugs (radon.data, radon.inits, radon.parameters,
"radon.1.bug",
n.chains=3, n.iter=500)
We still do not have radon1.bug.
plot (radon.bugs.1) # to get Figure 16.1 print (radon.bugs.1) # to display the results in the R console But after this # with 10 iterations radon.1<- bugs (radon.data, radon.inits, radon.parameters, "radon.1.bug", n.chains=3, n.iter=10) R programe give me an error: Errore in FUN(X[[1L]], ...) : oggetto "n" non trovato
As Uwe said, this seems very unlikely. If you can show us a clean, reproducible example we may be able to help. There's no obvious reason why the variable n should have existed at the time of your first run (radon.bugs.1) and then disappeared in the process of running plot(radon.bugs.1); print(radon.bugs.1). I suspect you are working through material from Andrew Gelman's book (since he has some radon examples)? [Uwe: one reason to chop out previous code/data is that if one posts via gmane, it complains if you don't have enough 'new stuff'. Sigh.]