Jun Ding wrote:
Hi,
I am just wondering if there is an easy way to count
in a numeric vector how many numbers don't have
replicates. For example, a=c(1,1,2,2,3,4,5), how can I know there are three
numbers (3, 4 and 5) without replicates?
How about using ?table:
tab <- table(a) unq <- names(tab)[tab == 1]
Then use as.numeric(unq) to convert the names to numbers if needed.
--sundar
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