请教各位高手什麼原因啊？


運行下面winBUGS程序出現問題："multiple definition of node b3[1] "-


model

{

for (i in 1:4)

{

u ~ dnorm(0, tau)

for (t in 1:3)

{



y[i,t] ~ dbern(p[i,t])



logit(p[i,t])<- b0[t] +b1[t]*x1[i,t]+b2[t]*x2[i,t]+b3[t]*x3[i,t]+u



b0[t] ~ dunif(1, 10)

b1[t] ~ dunif(1, 10)

b2[t] ~ dunif(1, 10)

b3[t] ~ dunif(1, 10)



}



}


tau ~ dgamma(0.001, 0.001)


}


x1[,1]
x1[,2]
x1[,3]
y[,1]
x2[,1]
x2[,2]
x2[,3]
y[,2]
x3[,1]
x3[,2]
x3[,3]
y[,3]
26
20
2
0
26
16
2
1
26
13
2
1
22
14
2
1
22
18
2
0
22
14
2
0
NA
NA
1
NA
NA
NA
1
NA
NA
NA
1
NA
24
17
1
1
24
15
1
1
24
12
1
0

END