any_duplicated
NoteAdded in 0.0.8
What it does
Checks for usage of any(duplicated(...)).
Why is this bad?
any(duplicated(...)) is valid code but requires the evaluation of duplicated() on the entire input first.
There is a more efficient function in base R called anyDuplicated() that is more efficient, both in speed and memory used. anyDuplicated() returns the index of the first duplicated value, or 0 if there is none.
Therefore, we can replace any(duplicated(...)) by anyDuplicated(...) > 0.
Example
x <- c(1:10000, 1, NA)
any(duplicated(x))Use instead:
x <- c(1:10000, 1, NA)
anyDuplicated(x) > 0References
See ?anyDuplicated