There is a blog post on this topic:
http://www.portfolioprobe.com/2012/07/26/r-inferno-ism-order-is-not-rank/
Pat
On 26/04/2015 09:17, Giorgio Garziano wrote:
Hi,
I cannot understand why rank(x) behaves as outlined below.
Based on the results of first x vector values ranking, which is as expected in
my opinion,
I cannot explain the following results.
x <- c(12,34,15,77,78)
x[rank(x)]
[1] 12 15 34 77 78 (OK)
x <- c(12,34,15,77,78,22)
x[rank(x)]
[1] 12 77 34 78 22 15 (?)
x <- c(12,34,77,15,78)
x[rank(x)]
[1] 12 77 15 34 78 (?)
Please any feedback ? Thanks.
BR,
Giorgio Garziano
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