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Exploring Data Frames episode: add a tip on the usage and the meaning of %in% operator #561
This submission is related to the "Exploring Data Frames" episode http://swcarpentry.github.io/r-novice-gapminder/05-data-structures-part2/index.html.
In the "Removing columns" section, the following commands were used:
However, this is the first time the "%in%" operator is used without any clarifications about its usage and what does it do or its meaning. This might create a confusion for students during the execution of this command.
I think it would be better to add a tip here about the meaning of this operator or guide the students on searching for help for this operator.