- bad handling of missing data (usually resulting in undecypherable error messages),
- parameters like "size" only for some plots (why?),
- some issues on the line of "str vs numeric".
In any case, I am using it, teaching others to do so and wishing it bright future.
But still, more than often I analyze data in Python and then
%%R -i df
ggplot(df, ...) + ...
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