yet another way,
> x <- read.table(textConnection("Category Value
+ b 1
+ b 2
+ a 7
+ a 1"), header=TRUE)
> y = transform(x, Category = relevel(Category, c("b")))
> str(y)
'data.frame': 4 obs. of 2 variables:
$ Category: Factor w/ 2 levels "b","a": 1 1 2 2
$ Value : int 1 2 7 1
HTH,
baptiste
2009/9/23 Chris Li <chri...@austwaterenv.com.au>:
>
> Hello,
>
> Say I have a dataset as followed:
>
> Category Value
> b 1
> b 2
> a 7
> a 1
>
> Then, if I:
>
> levels(Category)
>
> It will return:
> [a], [b]
>
> But I want to keep the original order, i.e.:
> [b], [a]
>
> Is it possible to do it in R?
>
> Thanks in advance!
>
> Chris
> --
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>
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