[R] Naming Convention

[Eric Lecoutre]

Hi,

Not right: any entry is allowed as long as it is a character. Though, some 
are not recommanded...
See:

 > M=diag(2)
 > rownames(M)=c("with a space", "without")
 > colnames(M) <- c("%*%","~")
 > M
              %*% ~
with a space   1 0
without        0 1

Problem araised for data.frame if you want to access to column by names:
 > M <- as.data.frame(M)
 > M$~
Error: syntax error
 > M$"~"
[1] 0 1

(same problem if name contains any other operator or a space)

Eric





At 10:32 13/01/2005, Christoph Scherber wrote:
>Dear Reinhold,
>
>All entries are allowed except "price swap" or "price_swap"
>
>Of course it´s most convenient to use short names and small letters for 
>quicker
>typing.
>
>Regards
>Christoph
>
>
>
>Quoting "Hafner, Reinhold (Risklab)" <Reinhold.Hafner at risklab.de>:
>
> > I was wondering whether there exists a naming convention for row and column
> > names in R data frames and matrices.
> > E.g: PriceSwap or PRICESWAP or PRICE.SWAP
> >
> > Many thanks.
> > Reinhold
> >
> >
> >       [[alternative HTML version deleted]]
> >
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> >
>
>
>
>
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Eric Lecoutre
UCL /  Institut de Statistique
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tel: (+32)(0)10473050
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