[R] R, Coda, and OpenBUGS

Bill Halteman halteman at math.umemat.maine.edu
Wed Oct 7 01:29:38 CEST 2009


Hi All,

   I am trying to figure out how to use R-Coda with the output from 
OpenBugs. I have installed and loaded the packages BRugs and R2WinBUGS.  
I have successfully run a simple Bayes model in WinBUGS using R2WinBUGS' 
"bugs" and have used "read.bugs" to build the coda object.  I can 
successfully switch to OpenBugs and run the same model and get the basic 
summary back.  However, I cannot build the coda object.  From what I 
have read "read.openbugs" should do the trick.  However, I have 
discovered the current version of OpenBUGS (v 3.03) doesn't write any 
output files in spite of setting codaPkg=TRUE in the "bugs" call.  
"Str(openbugs.object)" reveals a large collection of elements, one of 
which is an array that contains the MCMC chains.  Is there a function to 
build the coda object?

Thanks in advance for any suggestions,

Bill Halteman




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