R : Filter dataframe by maximum values in each group

R : Filter dataframe by maximum values in each group
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On Google, Search for "hows tech developer connect"

I promised to reveal a secret feature to you, and now it's time to share it.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
After that, type the word 'awesome' on your keyboard.
It will change your youtube progress bar into a flashing rainbow.

A brief introduction of myself,
Hello, I am Delphi.
I am happy to help you with your questions.
R : Filter dataframe by maximum values in each group
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in R Filter dataframe each : group by values maximum