[Rd] RE: [R] Bus error with xyplot
Mon Feb 3 20:38:02 2003
On Mon, 3 Feb 2003, Liaw, Andy wrote:
> > From: Martin Maechler [mailto:email@example.com]
> > >>>>> "Giovanni" == Giovanni Petris <GPetris@uark.edu>
> > >>>>> on Mon, 3 Feb 2003 08:36:06 -0600 (CST) writes:
> > Giovanni> Has anybody else experienced something like the
> > example below?
> > not recently.
> > Could it be that your version of the `grid' package (which is
> > loaded by `lattice') or `lattice' are incompatible (i.e. older
> > than) to your R version?
> > After library(lattice), use
> > .path.package()
> > to see where it was loaded from.
> This brings up (IIRC) a topic that was discussed on R-devel a while ago:
> Version checks for required packages. Is this feasible? Seems quite
> worthwhile to me...
It's not feasible. If package A is upgraded and makes package B need an
upgrade, there is no way for package B's maintainer to anticipate this.
Now one could be conservative and have B require exactly one version of A,
but then upgrading A makes B unusable. (The latter is what has happened a
few times with ghostscript and gsview/windvi.)
I have suggested before that grid be more closely integrated with R, and
become a base package. Then grid would only be changed when the R version
changes, and the critical incompatibility goes away.
Brian D. Ripley, firstname.lastname@example.org
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595