Reassembling logical operations on boolean vectors in Gnu R
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What a headline.. It’s about combining boolean vectors in R.
I just had some problems with computing a boolean vector as a result of applying AND to two boolean vectors:
1 2 3 4 | > x <- c(FALSE, TRUE, FALSE) > y <- c(TRUE, TRUE, FALSE) > x&&y [1] FALSE |
As you can see, it’s a nice result, but not what I want.. My hack was the following:
1 2 3 4 5 6 | > # logical AND > as.logical(x*y) [1] FALSE TRUE FALSE > # logical OR > as.logical(x+y) [1] TRUE TRUE FALSE |
When Rumpel, my personal R-freak, saw that hack, he just laughed and told me the short version of this hack:
1 2 3 4 5 6 | > # logical AND > x&y [1] FALSE TRUE FALSE > # logical OR > x|y [1] TRUE TRUE FALSE |
Nice, isn’t it 😉
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