Oh, I see what happened. I’d downloaded the latest Rstudio but I’d neglected to put it in my Applications folder, so my computer was still running the old version.
I now am using Rstudio version 1.3.959, and . . . it still doesn’t work! I guess I’ll wait until 1.3.1054 is in the regular version of Rstudio.
I hope this does not confuse readers of Regression and Other Stories! I don’t think we’re using parallel processing in the book code, but currently when you do library(“rstanarm”), you get this message:
- For execution on a local, multicore CPU with excess RAM we recommend calling
options(mc.cores = parallel::detectCores())
Now I wish we’d just recommended R, not Rstudio, in the book!