I do not understand what happens. Please note
> x<-c(-2,4,-6,5,9,7)
> x
[1] -2 4 -6 5 9 7
> order(x)
[1] 3 1 2 4 6 5
I do not understand why the x-vector is not ordered. Look, when I give order(x) add 7
And in this case? Supposedly you would not have to give me the vector x sorted in decreasing order?
> order(x, decreasing=TRUE)
[1] 5 6 4 2 1 3
How strange! Help please
The function order does not return the original ordered vector, but returns a vector with the positions so that x is in ascending order.
So, to get back the x pended vector, you have to put x[order(x)] :
x[order(x)]
[1] -6 -2 4 5 7 9
Or, in descending order:
x[order(x, decreasing=TRUE)]
[1] 9 7 5 4 -2 -6
If you want to do this directly, you can use the function sort , which already returns the ordered vector instead of the positions:
sort(x)
[1] -6 -2 4 5 7 9
Or:
sort(x, decreasing=TRUE)
[1] 9 7 5 4 -2 -6