[R] ggplot2 will not install after system upgrade

[Jeff Trefftzs]

On Thu, 2015-09-03 at 16:47 -0400, Ista Zahn wrote:
> Hi Jeff,
> Your chances of getting a useful response will increase if you
> provide
> some additional information. For example, which version of R? Which
> version of ggplot2? What sequence of commands produces the error?
> What
> _exactly_ does the error message say?
> 
> Does
> 
> update.packages(ask=FALSE, checkBuilt=TRUE)
> install.packages("ggplot2")
> 
> help?

Thank you, Ista!  This did, indeed, fix the problem.  ggplot2 now works
fine on both the laptop and the desktop computers.

-- 
Jeff Trefftzs
http://www.trefftzs.org