[R] Not-In operator

[Erik Iverson]

Giving a reproducible example would likely lead to a solution quickly.

Colton Hunt wrote:
> I would like to use grep to return all the lines of a data frame that do not
> contain the letters HD. I have tried the ^ inside brackets as well as !. The
> data frame is one column consisting of spaces,numbers, and letters with
> several thousand rows.
> Thank you!
> Colton
> 
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