[R] about MCMC pack again...

From: Mariagiulia Matteucci <matteucci_at_stat.unibo.it>
Date: Fri 11 Aug 2006 - 18:32:41 EST

Hello, thank you very much for your previous answers about the C++ code. I am interested in the application of the Gibbs Sampler in the IRT models, so in the function MCMCirt1d and MCMCirtkd. I've found the C++ source codes, as you suggested, but I cannot find anything about the Gibbs Sampler. All the files are for the Metropolis algorithm. Maybe I am not able to read them very well, by the way my problem is principally about missing data. Do you know how they deal with them? I cannot find any explanation, only that I can have some missing data. Do they skip the missing data or do they code them by "0"? And what about 2 types of missing data: not presented items and not answered items?

Thank you for reply,


Mariagiulia Matteucci
Dipartimento di Scienze Statistiche “Paolo Fortunati” Università di Bologna
Via Belle Arti, 41
40126 Bologna (ITALY)
e-mail: matteucci@stat.unibo.it
TEL: +39 051 264182
FAX: +39 051 232153

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