[R] A question about bugs.R: functions for running WinBUGs from R

Uwe Ligges ligges at statistik.uni-dortmund.de
Tue May 17 08:46:49 CEST 2005

Li, Jia wrote:

> Dear R users,
> I've found bugs.R : the functions for running WinBUGs from R that is
> writen by Dr. Andrew Gelman who is a professor from Columbia University.
> The bugs.R would be very useful for me,  and I think many of you know it
> as well. I followed the instuctions on Dr. Gelman's web to install all
> of documents that bugs.R needs, but when I try to run the school example
> the web posted in R, I got an error. 
> Would you please help me out? I am stuck on this for a while and really
> frustrated now.
> The program and the error as follow.
> Thanks a lot in advance!

Why do you post twice?
See my former message, you forgot to source() "bugs.R".

BTW: Since this code is from the website from Andrew Gelman, why do you 
think posting to R-help is the appropriate way to get help? R has a 
standardized mechanism for distributing code - called "package".
And the appropriate package "R2WinBUGS" you are looking for has been 
made available - thanks to Andrew's effort in writing the original code 
and thanks to the efforts of two others to generalize the code and 
package it for you.

Uwe Ligges

> Jiaa
> ________________________________________________________________________
> _
>># R code for entering the data and fitting the Bugs model for 8
> schools
>># analysis from Section 5.5 of "Bayesian Data Analysis".
>># To run, the Bugs model must be in the file "schools.txt" in your
> working
>># directory and you must load in the functions in the bugs.R file (see
>># http://www.stat.columbia.edu/~gelman/bugsR/).
>>J <- 8
>>y <- c(28,8,-3,7,-1,1,18,12)
>>sigma.y <- c(15,10,16,11,9,11,10,18)
>>schools.data <- list ("J", "y", "sigma.y")
>>schools.inits <- function()
> +   list (theta=rnorm(J,0,1), mu.theta=rnorm(1,0,100),
> +         sigma.theta=runif(1,0,100))
>>schools.parameters <- c("theta", "mu.theta", "sigma.theta")
>>#run in winbugs14
>>schools.sim <- bugs (schools.data, schools.inits, schools.parameters,
> "schools.bug", n.chains=3, n.iter=1000, version=1.4)
> Error: couldn't find function "bugs"
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