fsdias

I was able to solve this issue by using `binnedplot() ` from library `arm`.

From an end user's perspective I think this is fine. I would expect to find an exemple here: https://mc-stan.org/cmdstanr/articles/cmdstanr.html ``` a

> This is a duplicate of #3222. What is your locale? ``` $ locale LANG=en_US.UTF-8 LANGUAGE= LC_CTYPE=pt_PT.UTF-8 LC_NUMERIC=pt_PT.UTF-8 LC_TIME=pt_PT.UTF-8 LC_COLLATE="en_US.UTF-8" LC_MONETARY=pt_PT.UTF-8 LC_MESSAGES="en_US.UTF-8" LC_PAPER=pt_PT.UTF-8 LC_NAME=pt_PT.UTF-8 LC_ADDRESS=pt_PT.UTF-8 LC_TELEPHONE=pt_PT.UTF-8 LC_MEASUREMENT=pt_PT.UTF-8 LC_IDENTIFICATION=pt_PT.UTF-8 LC_ALL= ```