ripley@stats.ox.ac.uk
2002-Jun-28 05:51 UTC
package `methods' has persistent effects even if detached (PR#1715)
This came from an error in reg-tests-1.R> x <- as.data.frame(x=I("C"))[[1]] > class(x)[1] "AsIs"> library(methods) > detach("package:methods") > search()[1] ".GlobalEnv" "package:ctest" "Autoloads" "package:base"> x <- as.data.frame(x=I("C"))[[1]] > class(x)[1] "AsIs" "character" My reading is that this should not happen. -- Brian D. Ripley, ripley@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 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
Prof Brian D Ripley
2002-Jun-28 08:28 UTC
(PR#1715) Re: package `methods' has persistent effects even if detached
Sorry, forgot to say this is in R-devel (2002-06-27) but not in 1.5.1.> class.Primitive("class")> find("class")[1] "package:base"> library(methods) > class.Primitive("dataClass")> find("class")[1] "package:methods" "package:base"> get("class", "package:base").Primitive("dataClass")> detach("package:methods") > class.Primitive("dataClass") so attaching methods is altering the class object *in base*. Related to namespaces? On Fri, 28 Jun 2002 ripley@stats.ox.ac.uk wrote:> This came from an error in reg-tests-1.R > > > x <- as.data.frame(x=I("C"))[[1]] > > class(x) > [1] "AsIs" > > library(methods) > > detach("package:methods") > > search() > [1] ".GlobalEnv" "package:ctest" "Autoloads" "package:base" > > x <- as.data.frame(x=I("C"))[[1]] > > class(x) > [1] "AsIs" "character" > > My reading is that this should not happen. > > -- > Brian D. Ripley, ripley@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 272860 (secr) > Oxford OX1 3TG, UK Fax: +44 1865 272595 > > > -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- > r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html > Send "info", "help", or "[un]subscribe" > (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch > _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._ >-- Brian D. Ripley, ripley@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 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-devel mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-devel-request@stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._