Displaying 2 results from an estimated 2 matches for "posterior1".
Did you mean:
posterior
2006 May 11
1
about MCMC pack
Hello,
I tryed to use the MCMC pack, particularly the function MCMCirtKd to
simulate the posterior distribution in a multidimensional IRT model.
The code I used is:
posterior1 <- MCMCirtKd(Y, dimensions=2,
item.constraints=list("V2"=list(3,0)),
burnin = 1000, mcmc = 10000, thin=1, verbose = 1, seed = NA,
alphabeta.start = NA, b0 = 0, B0=0, store.item = FALSE,
store.ability=FALSE, drop.constant.items=TRUE)
where Y is a matrix subjects x items (15...
2008 Oct 18
1
Fehler in x$terms : $ operator is invalid for atomic vectors
Dear All
I try to use your R package MCMCpack and I have encountered the following problem:
The following code works fine:
library(MCMCpack)
line <- list(X = c(-2,-1,0,1,2), Y = c(1,3,3,3,5))
posterior1 <- MCMCregress(X~Y, data=line)
summary(posterior1)
But as long as I try the following lines
library(MCMCpack)
line <- list(X = c(-2,-1,0,1,2), Y = c(1,3,3,3,5))
posterior2 <- MCMCregress(paste(?X?,?Y?,sep=?~?), data = line)
summary(posterior2)
I get the following er...