# ArviZ Summary function

`az.summary`

is one of the most commonly used functions in ArviZ. It displays a dataframe with summary statistics and/or diagnostics. Given that summary statistics are computed differently for circular variables, this function had a boolean argument for handling them: `include_circ`

. When `True`

, `az.summary`

computed circular statistics for every variable in the model and displayed them on extra columns along the non-circular statistics dataframe.
In the past few days, I changed this argument to `circ_var_names`

, and now takes an iterable object. With this argument, the user can indicate which of the variables in the model are circular. Consequently, `az.summary`

computes circular statistics only for said variables with no need to append extra columns.
You can take a look at the code in this PR.
See you in the next post! :)