Determine if all values are contiguous integers in R
1 answer
Here is the solution. I have constructed it so that it returns TRUE
for a vector that contains a set of consecutive integers, even if some of them are repeated (for example c(1,3,2,1,1,1)
). If you want it to return FALSE
in such cases, just remove the part that calls unique()
.
is.adjacent <- function(X) {
all(diff(sort(unique(X))) == 1)
}
# Try it out
x <- c(1,2,3)
y <- c(1,2,4)
z <- c(4,2,1,3)
is.adjacent(x)
is.adjacent(y)
is.adjacent(z)
+7
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