dear all members
i have error in the code below "Error in Y[i, 9] = 0.9 * XI[i, 2] + eps[9]
: subscript out of bounds" is there anyone helps me please.
many thanks in advance
thanoon
llibrary(mvtnorm) #Load mvtnorm package
library(R2WinBUGS) #Load R2WinBUGS package
N=500 #Sample size
BZ=numeric(N) #Fixed covariate in structural equation
XI=matrix(NA, nrow=N, ncol=2) #Explanatory latent variables
Eta=numeric(N) #Outcome latent variables
Y=matrix(NA, nrow=N, ncol=8) #Observed variables
#The covariance matrix of xi
phi=matrix(c(1, 0.3, 0.3, 1), nrow=2)
#Estimates and standard error estimates
Eu=matrix(NA, nrow=100, ncol=10); SEu=matrix(NA, nrow=100, ncol=10)
Elam=matrix(NA, nrow=100, ncol=7); SElam=matrix(NA, nrow=100, ncol=7)
Eb=numeric(100); SEb=numeric(100)
Egam=matrix(NA, nrow=100, ncol=5); SEgam=matrix(NA, nrow=100, ncol=5)
Esgm=matrix(NA, nrow=100, ncol=10); SEsgm=matrix(NA, nrow=100, ncol=10)
Esgd=numeric(100); SEsgd=numeric(100)
Ephx=matrix(NA, nrow=100, ncol=3); SEphx=matrix(NA, nrow=100, ncol=3)
R=matrix(c(1.0, 0.3, 0.3, 1.0), nrow=2)
parameters=c("u", "lam", "b", "gam", "sgm", "sgd", "phx")
init1=list(u=rep(0,10), lam=rep(0,7), b=0, gam=rep(0,5), psi=rep(1,10),
psd=1, phi=matrix(c(1, 0, 0, 1), nrow=2))
init2=list(u=rep(1,10), lam=rep(1,7), b=1, gam=rep(1,5), psi=rep(2,10),
psd=2, phi=matrix(c(2, 0, 0, 2), nrow=2))
inits=list(init1, init2)
eps=numeric(10)
for (t in 1:100) {
#Generate Data
for (i in 1:N) {
BZ[i]=rt(1, 5)
XI[i,]=rmvnorm(1, c(0,0), phi)
delta=rnorm(1, 0, sqrt(0.36))
Eta[i]=0.5*BZ[i]+0.4*XI[i,1]+0.4*XI[i,2]+0.3*XI[i,1]*XI[i,2]
+0.2*XI[i,1]*XI[i,1]+0.5*XI[i,2]*XI[i,2]+delta
eps[1:3]=rnorm(3, 0, sqrt(0.3))
eps[4:7]=rnorm(4, 0, sqrt(0.5))
eps[8:10]=rnorm(3, 0, sqrt(0.4))
Y[i,1]=Eta[i]+eps[1]
Y[i,2]=0.9*Eta[i]+eps[2]
Y[i,3]=0.7*Eta[i]+eps[3]
Y[i,4]=XI[i,1]+eps[4]
Y[i,5]=0.9*XI[i,1]+eps[5]
Y[i,6]=0.7*XI[i,1]+eps[6]
Y[i,7]=0.5*XI[i,1]+eps[7]
Y[i,8]=XI[i,2]+eps[8]
Y[i,9]=0.9*XI[i,2]+eps[9]
Y[i,10]=0.7*XI[i,2]+eps[10]
}
#Run WinBUGS
data=list(N=500, zero=c(0,0), z=BZ, R=R, y=Y)
model<-bugs(data,inits,parameters,
model.file="C:/Simulation/model.txt",
n.chains=2,n.iter=10000,n.burnin=4000,n.thin=1,
bugs.directory="c:/Program Files/WinBUGS14/",
working.directory="C:/Simulation/")
#Save Estimates
Eu[t,]=model$mean$u; SEu[t,]=model$sd$u
Elam[t,]=model$mean$lam; SElam[t,]=model$sd$lam
Eb[t]=model$mean$b; SEb[t]=model$sd$b
Egam[t,]=model$mean$gam; SEgam[t,]=model$sd$gam
Esgm[t,]=model$mean$sgm; SEsgm[t,]=model$sd$sgm
Esgd[t]=model$mean$sgd; SEsgd[t]=model$sd$sgd
Ephx[t,1]=model$mean$phx[1,1]; SEphx[t,1]=model$sd$phx[1,1]
Ephx[t,2]=model$mean$phx[1,2]; SEphx[t,2]=model$sd$phx[1,2]
Ephx[t,3]=model$mean$phx[2,2]; SEphx[t,3]=model$sd$phx[2,2]
}
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