ripley at stats.ox.ac.uk
2009-Nov-26 08:15 UTC
[Rd] Detaching one package can remove the S4 methods of another (PR#14087)
Putting on public record
library(spdep)
showMethods("[")
detach("package:spdep", unload = TRUE)
detach("package:Matrix", unload=TRUE)
showMethods("[") # sp methods still there
detach("package:spam", unload = TRUE)
showMethods("[") # sp methods have gone
This is one of several examples found by package testing in R-devel
(this one from BayesX) with _R_CHECK_UNLOAD_NAMESPACES_ set.
Session info after the first command:
R version 2.10.0 Patched (2009-11-23 r50545)
x86_64-unknown-linux-gnu
locale:
[1] LC_CTYPE=en_GB.utf8 LC_NUMERIC=C
[3] LC_TIME=en_GB.utf8 LC_COLLATE=C
[5] LC_MONETARY=C LC_MESSAGES=en_GB.utf8
[7] LC_PAPER=en_GB.utf8 LC_NAME=C
[9] LC_ADDRESS=C LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_GB.utf8 LC_IDENTIFICATION=C
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] spdep_0.4-52 nlme_3.1-96 coda_0.13-4 MASS_7.3-4
[5] Matrix_0.999375-32 lattice_0.17-26 spam_0.15-5 boot_1.2-41
[9] maptools_0.7-26 foreign_0.8-38 sp_0.9-47 deldir_0.0-10
loaded via a namespace (and not attached):
[1] grid_2.10.0
Happens also in 2.10.0 and
R version 2.11.0 Under development (unstable) (2009-11-25 r50568)
--
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