On Thu, Jul 2, 2009 at 3:34 PM, Sebastien
Bihorel<sebastien.biho...@cognigencorp.com> wrote:
> Dear R-users,
>
> I would like to know how expressions could be passed as arguments to do.call
> functions. As illustrated in the short example below, concatenating lists
> objects and an expression creates an expression object, which is not an
> acceptable argument for do.call. Is there a way to avoid that?
>
> Thanks you
>
> Sebastien
>
>
> foo <- list(x=1:10, y=1:10)
> mylist <- list(pch=6, col=2)
> title <- "1 microgram"
> title2 <- expression ("1 " mu "g")
>
> do.call(plot, c(foo, mylist, main=title))
>
> class(c(foo, mylist, main=title2))
>
> do.call(plot, c(foo, mylist, main=title2))do.call(plot, c(foo, mylist, list(main=title2))) Both foo and myllist are already lists, but title2 isn't. Hadley -- http://had.co.nz/ ______________________________________________ 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.
