How to sum a variable by group in R

This is a quick tutorial on how to sum a variable by group in R using the dplyr package group_by function. We also show how to count how many are in the group as well as the average of the group. Isn't R the best programming language of all time?

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[meidangreenberg]

You literary saved my 3 pass days, and my life. THANK YOU

[claudiolobenwein]

Awesome! Hours and hours trying to do this and you made it quite easy. Thank you!

[analyst]

Awesome! This was exactly what I was trying to figure out how to do. Thank you!

[امعبدالله-تثت]

Thank you so much, I would ask you how
2:43 can I make same with conductionnot equal 0

[ankitha]

hey, how do you plot a graph of sum_enroll ? Could anyone please help with that?

[RenatoVargas]

Thank you very much for this. This was perfect and very helpful!!!

[Baisuzhen]

Thank you for the video! It was
exactly what I was looking for. However, my summary is only showing the first 10 rows of my data 27 more rows). Is there a function to display all the rows? Any help would be much appreciated.

[StockSpotlightPodcast]

Why tbl_df instead of as_tibble? Was tbl_df the norm back in 2017? Also, I'm not sure if it's an issue with the data set or me, but the average enrollment seems very low. I plugged in medians and still got low numbers (1338 for no, 328 for yes).

[AtliTobiasson]

How about when you need to count cases, because sum doesn't work for words
"invalid 'type' (character) of argument"

[marianahigueras]

Hey! Can you help me!? I don't know why group_by is not working. I don't know if I am doing something wrong

[mive.f]

Hi I'm looking for an R tutor to help me out with my course, does anyone know anyone or can help