[程式] WinBug and R
大家好 我在編寫Winbug的程式時 出現了一些困難
請大家指點我一下 感激不盡
R 的code :
J<-38
y<-goal
venue<-data[,2]
data.m<-list("J","y","venue")
inits<-function(){
list(alpha=rnorm(J,0,100),beta=rnorm(1,0,100),error=rnorm(1,0,100))}
parameters<-c("Alpha","Beta","Sigma")
goal.sim <-
bugs(data.m,inits,parameters,"poissonmodel.txt",n.chain=3,n.iter=1000,debug=TRUE)
sim<-goal.sim$sims.list
Winbug poissmodel的code:
model {
for ( j in 1:J) {
y[j] ~ dpois (lambda[j])
error[j] ~ dnorm (0,tau)
log (lambda[j] ) <- ( alpha+beta * venue [j]+ error[j] )
}
alpha ~ dnorm (0.59168 , 0.05689)
beta ~ dnorm (0.23537 , 0.07612)
tau ~ dgamma (0.001,0.001)
sigma <- 1 / sqrt(tau)
}
註：我的模型為 log (lamdba) = alpha + beta * venue + error
感謝大家！！！
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