[EMAIL PROTECTED] wrote:
> ?as.numeric
in response to
> ok how can I do to cancel le function factor for the moment ican't do
> this and I'm stuck with my problem for exemple
.......
<snip>
The use of as.numeric() to convert a factor to a numeric
vector is fraught with peril.
E.g.
> f <- factor(rep(2*(1:5),3))
> f
[1] 2 4 6 8 10 2 4 6 8 10 2 4 6 8 10
Levels: 2 4 6 8 10
> as.numeric(f)
[1] 1 2 3 4 5 1 2 3 4 5 1 2 3 4 5
which is probably not what one was expecting or wanting.
However you *can* get what you want:
> as.numeric(as.character(f))
[1] 2 4 6 8 10 2 4 6 8 10 2 4 6 8 10
cheers,
Rolf Turner
[EMAIL PROTECTED]
P.S. To save myself key-strokes I have written a wee function
f2n <- function(x){as.numeric(as.character(x))}
R. T.
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