It seems unlink doesn't work with wildcards in 2.5.0. I've tried
R-2.5.0 under gnu/linux from source and the Mac binary from att
research. Example:
> dir()
[1] "bgx.Rnw" "bgx.pdf" "run.1"
> unlink("run.*",recursive=T)
> dir()
[1] "bgx.Rnw" "bgx.pdf" "run.1"
> unlink("run.1",recursive=T)
> dir()
[1] "bgx.Rnw" "bgx.pdf"
Cheers,
Ernest