The definition of 'order' is that x[order(x)] is in increasing order. E.g.,
> x <- c(19,17,23,11)
> order(x)
[1] 4 2 1 3
> x[order(x)]
[1] 11 17 19 23
You may be looking for what 'rank' does:
> rank(x)
[1] 3 2 4 1
(If x has no ties, then rank(x) is order(order(x)).)
Bill Dunlap
TIB
On Tue, 18 Jul 2017 09:58:19 +0700
Jesadaporn Pupantragul wrote:
> Hello r-help
> I am learning R and use R-studio.
> I create vector x <- c(19,17,23,11) and use function order(x).
> The result show [1] 4 2 1 3. Why it doesn't show [1] 3 2 4 1.
> Follow picture that i attach.
> Thank you for you
I think you want rank, not order.
> x <- c(19,17,23,11)
> order(x)
[1] 4 2 1 3
> rank(x)
[1] 3 2 4 1
See help(order) and help(rank) for the difference.
Peter
On Mon, Jul 17, 2017 at 7:58 PM, Jesadaporn Pupantragul
wrote:
> Hello r-help
> I am learning R and use R-studio.
> I create vector x <-
You need to study ?order and perhaps also subscripting. If that isn't
sufficient, I suggest you consult one of the many R web tutorials that
cover this.
Perhaps this will help:
x[order(x)] gives x in sorted order, which is what you woud get with
sort(x). Indeed, the code implementing sort.defaul
Hi Jesadaporn,
Try:
order(x,decreasing=TRUE)
Jim
On Tue, Jul 18, 2017 at 12:58 PM, Jesadaporn Pupantragul
wrote:
> Hello r-help
> I am learning R and use R-studio.
> I create vector x <- c(19,17,23,11) and use function order(x).
> The result show [1] 4 2 1 3. Why it doesn't show [1] 3 2 4 1.
>
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