*Dear R-user,
*
I try to run Winbugs from R using bugs function in R2WinBUGS.My model works
well in Winbugs except that I can't get DIC. Since I don't need DIC, when I
try to run Winbugs from R , I set "DIC=FALSE". My model is as following:
model {
for (i in 1:N) {
for(j in 1 : T ) {
x[i, j] ~ dbin(p[i, j],n[i])
#Hier.prior
p[i, j] ~ dbeta(alpha[i, j], beta[i, j])
alpha[i, j] < - pi[ j]*(1-theta[i])/theta[i]
beta[i, j] < -(1-pi[ j])*(1-theta[i])/theta[i]
}
}
for(j in 1 : T ) {
pi[ j ] ~dbeta(0.1,0.1)I(0.1,0.9)
}
for (i in 1:N) {
theta[i] ~dbeta(2,10)
}
}
And my R code is as followings:
initials1<-list(theta=c(0.2,0.01), pi=rbeta(50, 0.1, 0.1)*0.8+0.1
, p=matrix(rbeta(100, 2, 10)*0.8+0.1,nr=2,nc=50,byrow=TRUE))
inits<-list(initials1 initials1)
data<-list(N=2,T=50 ,n=c(100,150),x = structure(.Data = c(
3, 47, 8, 19, 87, 69,
2, 4, 75, 24, 16, 81,
10, 78, 87, 44, 17, 56,
23, 75, 55, 85, 84, 69,
6, 36, 8, 90, 47, 6,
87, 61, 49, 57, 28, 56,
31, 54, 75, 79, 67, 38,
28, 13, 89, 63, 32, 68,
70, 7,
24, 95, 8, 14, 127, 134,
7, 8, 133, 40, 76, 126,
0, 132, 120, 137, 9, 91,
3, 130, 18, 80, 134, 95,
12, 34, 19, 111, 34, 25,
127, 79, 132, 84, 72, 134,
67, 44, 95, 69, 80, 51,
57, 12, 138, 137, 64, 80,
130, 58), .Dim = c(2, 50)))
#run winbugs
library(R2WinBUGS)
structure<-bugs(data,inits,model.file="S:/Common/zhangqi/ebayes/for
R/model.txt",
parameters=c("p","pi","theta"),n.chains=2,n.iter=2000,n.burnin=500,
debug=TRUE,DIC=FALSE,bugs.directory="c:/Program Files/WinBUGS14/",
working.directory = NULL )
Even if I changed initial values several times, I still keep geting the
following error message in Winbugs:
display(log)
check(S:/Common/zhangqi/ebayes/for R/model.txt)
model is syntactically correct
data(C:/Program Files/R/rw2011/data.txt)
data loaded
compile(2)
model compiled
inits(1,C:/Program Files/R/rw2011/inits1.txt)
value of binomial x[1,28] must be between zero and order of x[1,28]
I really have no clue about what I can do to fix it.
Could any of your please take a look at my problem, I truely appreciate any
suggestions.
Qi Zhang
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