Hope to get some clarity from the creators of a (wonderful) package
ChoiceModelR. I am using the main function 'choicemodelr'.
Everything works.
?choicemodelr says "average of MCMC draws of unit-level model coefficients
are written to Xbetas.csv"
Question 1: Is this a typo? The real file created in the working directory
seems to be "Rbetas.csv"
Questions 2: Are these the averages of the 'use' draws (specified in my
choicemodelr statement)?
Question 3: If I had constraints, I assume these averages will be "taking
into account constraints", right?
?choicemodelr also says that choicemodelr produces an object that contains,
among other things, two elemens:
betadraw
An ni by natt by floor(use/keep) array of MCMC random draws of unit-level
multinomial logit model parameter estimates.
betadraw.c
An ni by natt by floor(use/keep) array of constrained MCMC random draws of
unit-level multinomial logit model parameter estimates.
If I do:
apply(out$betadraw.c,c(1,2),mean)
then what is the difference between the result and the file written to Disk?
One difference I noticed:
apply(out$betadraw.c, c(1,2),mean) contains as many columns as parameters,
not as many columns as the number of levels.
What else?
Thank you very much!
--
Dimitri Liakhovitski
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