jags.trace: Trace plots of selected parameters from an R2jags object.

In mbtyers/jagsplot: Diagnostic plotting tools for R2jags output

Description

Trace plots of selected parameters from an R2jags object.

Usage

jags.trace(jags.out, which.param = NULL)

Arguments

jags.out	A jags output object from R2jags
which.param	A vector of the parameter indices we're interested in plotting. Calling jags.names() first can help with this.

Author(s)

Matt Tyers

Examples

# ------------ a sample R2jags model ----------- #

## Not run: 
library(R2jags)
N <- 1000
x <- 1:N
epsilon <- rnorm(N, 0, 1)
y <- x + epsilon

cat('model {
 for (i in 1:N){
   y[i] ~ dnorm(y.hat[i], tau)
	y.hat[i] <- a + b * x[i]
}
a ~ dnorm(0, .0001)
b ~ dnorm(0, .0001)
tau <- pow(sigma, -2)
sigma ~ dunif(0, 100)
}', file="test.jags")

test.data <- list(x=x,y=y,N=N)
test.jags.out <- jags(model.file="test.jags", data=test.data, 
     parameters.to.save=c("a","b","tau","sigma"), n.chains=3, n.iter=1000)

# ------------- calling jags.trace() ------------ #
par(mfrow=c(3,2))
jags.trace(test.jags.out)

# say we're only interested in parameters a and b
jags.names(test.jags.out)
par(mfrow=c(2,1))
jags.trace(test.jags.out,which.param=1:2)

## End(Not run)

mbtyers/jagsplot documentation built on May 22, 2019, 12:58 p.m.