FAQ: Introduction to Data Frames in R - Filtering Rows with Logic II

This community-built FAQ covers the “Filtering Rows with Logic II” exercise from the lesson “Introduction to Data Frames in R”.

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1 Like

I just have a simple question about the use of the not operator in R. In the example, we are given the following snippet:

orders %>%
filter(!(shoe_color == red))

Why wouldn’t we just use:
orders %>%
filter(shoe_color != red)

Thanks for the help


How do I implement an filter to check:

A | (B & C)

why is it
orders %>%
filter(!(shoe_color == red))
and not
orders %>%
filter(!(shoe_color == “red”))
since red is not a number…?

You are correct. There is a typo in the code snippet. It should be ‘red’ instead of red.

1 Like

Tested it and it gives the same result for
not_rock_groups ← filter(artists,genre!=‘Rock’)
not_rock_groups ← filter(artists,!(genre==‘Rock’))

also wondering why any of these would be preferred