Maybe something like this: stopifnot(tail(unlist(strsplit("slides.pdf", "\\.")), 1) == "txt")
On Fri, Jul 18, 2008 at 12:51 PM, mysimbaa <[EMAIL PROTECTED]> 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 > -- > View this message in context: > http://www.nabble.com/read-and-check-table-tp18532292p18532292.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. > -- Henrique Dallazuanna Curitiba-Paraná-Brasil 25° 25' 40" S 49° 16' 22" O ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.