<rkevinbur...@charter.net> wrote:
> I am unclear what names(x) <- does?
>
> On the outset it seems relatively clear.
>
> But what if there are already names?
>
> What if there are already names on the object and they are in a different
> order than specified in the names on the right hand side? I tried it and it
> just replaces what was there as seems the simplest approach. But doesn't that
> seem a little dangerous? If I swap names for a variable and then later
> reference the variable by name I would get unexpected results. Right?
>
> Kevin
Right: when you change a name, the old name no longer works.
You can also do things like this, to change specific names:
-----Begin R session-----
> a = 1:5
> names(a) <- letters[1:5]
> a
a b c d e
1 2 3 4 5
> names(a)[3] <- "Kevin"
> a
a b Kevin d e
1 2 3 4 5
> names(a)[which(names(a)=="b")] <- "Brad"
> a
a Brad Kevin d e
1 2 3 4 5
-----End R session-----
Does that help?
--
Mike Prager, NOAA, Beaufort, NC
* Opinions expressed are personal and not represented otherwise.
* Any use of tradenames does not constitute a NOAA endorsement.
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