match - Negation of %in% in R

Question

(This question already has answers here): question from:https://stackoverflow.com/questions/38351820/negation-of-in-in-r

Answer 1

No, there isn't a built in function to do that, but you could easily code it yourself with

`%nin%` = Negate(`%in%`)

Or

`%!in%` = Negate(`%in%`)

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See this thread and followup discussion: %in% operator - NOT IN

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Also, it was pointed out the package Hmisc includes the operator %nin%, so if you're using it for your applications it's already there.

library(Hmisc)
"A" %nin% "B"
#[1] TRUE
"A" %nin% "A"
#FALSE