On 07.06.2013 21:25, Dimitri Liakhovitski wrote:
Hope to get some clarity from the creators of a (wonderful) package ChoiceModelR. I am using the main function 'choicemodelr'.
Since we do not know if these "creators" are reading the list, why not ask them directly?
Best, Uwe Ligges
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!
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