Do you mean:
> (!A || !B) && X < Y
[1] FALSE
?
문제
I am getting a bit confused by the use of the short and long forms of logical operators in R.
If I have the following values
A <- FALSE
B <- TRUE
X <- 3
Y <- 2
I would like to evaluate NOT(A) OR NOT(B) AND X < Y
I expect FALSE
given the parameters
This is the expression I have found to evaluate this in R
so it returns FALSE
as I expect:
!A & X < Y || !B & X < Y
Can I eliminate the repeated X < Y
comparison?
해결책
Do you mean:
> (!A || !B) && X < Y
[1] FALSE
?
다른 팁
short form gives you a vector.
long form gives you a single value.
compare:
x <- c(TRUE, TRUE, FALSE)
y <- c(TRUE, FALSE, FALSE)
X && Y
X & y
x || y
x | y
Another possibility:
!(A * B) && X < Y