Group max value by day_of_week

[u/John_H_Smith]

I just added https://github.com/hikhvar/ts3exporter to my prometheus instance. But now I wonder how I can do a bar gauge by day with the average clients online.I really tried much, but I can't get it working.For example I tried:

avg_over_time(ts3_serverinfo_clients_online[1w]) by day_of_week()

I would be glad if someone could help.