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confidence intervals with mvrnorm - upper value equal to inf

It's hard to troubleshoot this without a reproducible example. Unless 
the answer is obvious -- which it's not, to me -- the easiest way to 
troubleshoot is to work through the steps one at a time and see where 
the infinite values first appear.  Can you create such an example either 
by posting your data or by simulating data that looks like your data?

   The posterior predictive simulation approach assumes that the 
sampling distributions of the parameters are multivariate normal, which 
is likely to be questionable in a low-information setting (which will be 
the case if you don't have very many non-zero values ...)
On 10/10/20 7:28 AM, Alessandra Bielli wrote: