search for: s4_extend

Displaying 8 results from an estimated 8 matches for "s4_extend".

Did you mean: s4_extends
2016 Apr 19
4
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
...an S4 object around, the methods package should be available to deal with it. ~G On Tue, Apr 19, 2016 at 7:34 AM, Michael Lawrence <lawrence.michael at gene.com > wrote: > Right, R_has_methods_attached() uses that. Probably not the right > check, since it refers to S4 dispatch, while S4_extends() is used by > S3 dispatch. > > Perhaps S4_extends() should force load the methods package? The above > example works after fixing the check to ensure that R_MethodsNamespace > is not R_GlobalEnv, but one could load a serialized S4 object and > expect S3 dispatch to work with Rsc...
2016 Apr 19
2
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
...t; >> > >> Right, the methods package is not attached by default when running R > >> with Rscript. We should probably remove that special case, as it > >> mostly just leads to confusion, but that won't happen immediately. > >> > >> For now, the S4_extends() should probably throw an error when the > >> methods namespace is not loaded. And the check should be changed to > >> directly check whether R_MethodsNamespace has been set to something > >> other than the default (R_GlobalEnv). Agreed? > >> > >> On M...
2016 Apr 19
0
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
Right, R_has_methods_attached() uses that. Probably not the right check, since it refers to S4 dispatch, while S4_extends() is used by S3 dispatch. Perhaps S4_extends() should force load the methods package? The above example works after fixing the check to ensure that R_MethodsNamespace is not R_GlobalEnv, but one could load a serialized S4 object and expect S3 dispatch to work with Rscript. On Tue, Apr 19, 2016 a...
2016 Apr 19
0
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
...ackage should be available to deal with it. > > ~G > > On Tue, Apr 19, 2016 at 7:34 AM, Michael Lawrence <lawrence.michael at gene.com >> wrote: > >> Right, R_has_methods_attached() uses that. Probably not the right >> check, since it refers to S4 dispatch, while S4_extends() is used by >> S3 dispatch. >> >> Perhaps S4_extends() should force load the methods package? The above >> example works after fixing the check to ensure that R_MethodsNamespace >> is not R_GlobalEnv, but one could load a serialized S4 object and >> expect S3 d...
2016 Apr 19
3
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
...-Kirill On 19.04.2016 04:10, Michael Lawrence wrote: > Right, the methods package is not attached by default when running R > with Rscript. We should probably remove that special case, as it > mostly just leads to confusion, but that won't happen immediately. > > For now, the S4_extends() should probably throw an error when the > methods namespace is not loaded. And the check should be changed to > directly check whether R_MethodsNamespace has been set to something > other than the default (R_GlobalEnv). Agreed? > > On Mon, Apr 18, 2016 at 4:35 PM, Kirill M?ller &g...
2016 Apr 18
3
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
Scenario: An S3 method is declared for an S4 base class but called for an instance of a derived class. Steps to reproduce: > Rscript -e "test <- function(x) UseMethod('test', x); test.Matrix <- function(x) 'Hi'; MatrixDispatchTest::test(Matrix::Matrix())" Error in UseMethod("test", x) : no applicable method for 'test' applied to an
2016 Apr 19
0
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
Right, the methods package is not attached by default when running R with Rscript. We should probably remove that special case, as it mostly just leads to confusion, but that won't happen immediately. For now, the S4_extends() should probably throw an error when the methods namespace is not loaded. And the check should be changed to directly check whether R_MethodsNamespace has been set to something other than the default (R_GlobalEnv). Agreed? On Mon, Apr 18, 2016 at 4:35 PM, Kirill M?ller <kirill.mueller at ivt....
2016 Apr 19
0
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
...10, Michael Lawrence wrote: >> >> Right, the methods package is not attached by default when running R >> with Rscript. We should probably remove that special case, as it >> mostly just leads to confusion, but that won't happen immediately. >> >> For now, the S4_extends() should probably throw an error when the >> methods namespace is not loaded. And the check should be changed to >> directly check whether R_MethodsNamespace has been set to something >> other than the default (R_GlobalEnv). Agreed? >> >> On Mon, Apr 18, 2016 at 4:35...