Hi, thank you. I am using the 2pl model described above. I would like to generate a variable consisting of the mean of the posterior distribution for each subject but I'm not sure how to do this with the data in long form. I see there are bayespredict commands, but when I use it, I get the following error: "model parameter subj:1bn.appt_id not found". Thank you for any guidance you can provide.
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