Hi Vincent,
Perhaps the following might work:
# defining a function
is.installed <- function(mypkg) is.element(mypkg, installed.packages()[,1])
R> is.installed('MASS')
[1] TRUE
R> is.installed('base')
[1] TRUE
R> is.installed('ROCR')
[1] FALSE
HTH,
Jorge
On Sun, Apr 4, 2010 at 12:40 AM, Vincent Davis <> wrote:
> I am aware of .packages(all.available = TRUE) but I would like to just
> ask .packages('base') and get TRUE or even better check a list of packages
> and get a true/false list back. Is there a way to do this?
>
> *Vincent Davis
> 720-301-3003 *
> [email protected]
> my blog <http://vincentdavis.net> |
> LinkedIn<http://www.linkedin.com/in/vincentdavis>
>
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and provide commented, minimal, self-contained, reproducible code.
