Maybe something like this:
stopifnot(tail(unlist(strsplit("slides.pdf", "\\.")), 1) ==
"txt")
On Fri, Jul 18, 2008 at 12:51 PM, mysimbaa <adel.tekari at sisltd.ch>
wrote:>
> Dear R users,
> I want to read a file like following :
>
> if it is a table then z <- read.table(pathname, dec=".",
header=TRUE)
> else if it's not a table (image,doc,...) then send an error or
something
> like that
>
> acually I have a read.table in the beginnig of my R code, and if my data is
> not a table I become in my R console : fail in scan.
> So the question is how to check the nature of the file?
> something like : is.table?
> I don't know the function.
>
> Thanks for any help
> Adel
> --
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>
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--
Henrique Dallazuanna
Curitiba-Paran?-Brasil
25? 25' 40" S 49? 16' 22" O