Hello,
Inline.
Em 16-04-2013 18:51, Julio Sergio escreveu:
I thought I've understood the 'order' function, using simple examples like:
order(c(5,4,-2))
[1] 3 2 1
However, I arrived to the following example:
order(c(2465, 2255, 2085, 1545, 1335, 1210, 920, 210, 210, 505, 1045))
[1] 8 9 10 7 11 6 5 4 3 2 1
and I was completely perplexed!
Shouldn't the output vector be 11 10 9 8 7 6 4 1 2 3 5 ?
No, why should it?
Try assigning the output of order and see what happens to the vector.
x <- c(2465, 2255, 2085, 1545, 1335, 1210, 920, 210, 210, 505, 1045)
(o <- order(x) )
x[o] # Allright
Hope this helps,
Rui Barradas
Do I have a damaged version of R?
I became still more astonished when I used the sort function and got the
right answer:
sort(c(2465, 2255, 2085, 1545, 1335, 1210, 920, 210, 210, 505, 1045))
[1] 210 210 505 920 1045 1210 1335 1545 2085 2255 2465
since 'sort' documentation claims to be using 'order' to establish the right
order.
Please help me to understand all this!
Thanks,
-Sergio.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
______________________________________________
R-help@r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
