Convert vector of 0 and 1 to binary vector in R

Question

It is quite surprise to me that I could not find a ready answer for this question on stackoverflow.

In R, I have a vector of 0 and 1, and I wan

Answer 1

We can use !!:

rep(0:1, 5)
[1] 0 1 0 1 0 1 0 1 0 1

!!rep(0:1, 5)
[1] FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE FALSE  TRUE

All 0s will be converted to FALSE, any other numeric to TRUE.