On Sun, 1 Apr 2007, Renaud Lancelot wrote:
Dear all,
I just installed R 2.5.0alpha and noticed new warnings related to the
extractor "$" when using contributed packages. For instance:
Warning message:
$ operator is not valid for atomic vectors, returning NULL
Package aod, version 1.1-18
data(orob2)
m1 <- betabin(cbind(y, n-y) ~ 1, random = ~ 1, data = orob2)
head(residuals(m1))
1 2 3 4 5 6
-1.4629774 -0.7897877 -1.3754283 0.1029910 -0.3556985 1.4030026
Warning message:
$ operator not defined for this S4 class, returning NULL
In these two cases, I deleted the former installations and re-built
the packages from sources.
How to overcome this problem ?
Wait for package updates. For RODBC, it is harmless but the warning will
not appear in 1.1-9 (which will be released before R 2.5.0 is).
(The first message is not really right: $ for lists was valid and
documented to return NULL in released versions of R, as it was in the Blue
Book. It should say that it is 'deprecated' in R 2.5.0, since this
amounts to a change of language definition and that should be giving a
warning of deprecation.)
Later versions of R 2.5.0 alpha give more informative messages.
--
Brian D. Ripley, ripley at stats.ox.ac.uk
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