update in free_r_tip 20 (SQL from R) required.

[fschier]

dplyr::across does not take a vector of c(mean, median) as a value to the .fns argument. Instead a list list(mean, median) is required.
Found this by coincidence, so other skripts might need some adaption as well.

Greetings
Felix

[WebscienceXYZ]

Thank you

[mdancho84]

Thanks. I've updated this in the lesson.