The Arviz model is using the new Stan language syntax for arrays.
I would suggest checking out CmdStanPy which also works with ArviZ. A nice discussion of the differences between the two is here: CmdStanPy 1.0 - #3 by WardBrian
The Arviz model is using the new Stan language syntax for arrays.
I would suggest checking out CmdStanPy which also works with ArviZ. A nice discussion of the differences between the two is here: CmdStanPy 1.0 - #3 by WardBrian