[R] A problem with order() function in R

[William Dunlap]

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
TIBCO Software
wdunlap tibco.com

On Mon, Jul 17, 2017 at 7:58 PM, Jesadaporn Pupantragul <
jp.beckmcs at gmail.com> 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 answer.
>
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