similar to: S4 group generic with additional argument

Hi R friends,   I'm still studying S4 classes and I have a question about slot assignment. Why would I have to use a special setter method [example 2 below] if I can assign data to a slot directly when I call new() [example 1 below]?   ## first way to do it (the idiosyncratic way?) setClass(Class = "TestClass", representation = representation(myDf = "data.frame"))

Dear list, When playing around with the "[" method for S4 classes I noticed that it gets called twice in my example. setClass("testClass", representation(a="character")) setMethod("[", signature(x = "testClass", i = "ANY", j="ANY"), function (x, i, j, ..., drop){ print("void function")

Hi, I just figured out that I accidentally posted my message in HTML, so I am retrying in plain text only. Sorry. I am currently extending one of our CRAN packages and ran into an unexpected problem when checking the source package. I got some warnings in the step "* checking for code/documentation mismatches". I double checked everything and did not see anything that would

Hi, I am currently extending one of our CRAN packages and ran into an unexpected problem when checking the source package. I got some warnings in the step "* checking for code/documentation mismatches". I double checked everything and did not see anything that would actually justify this warning. After testing around for quite a while, I think I can now pinpoint the problem. In

Hi all, this is my first post in R devel? sorry if I lost some of the guidelines. Anyway this is my problem: Version: R version 2.15.2 (2012-10-26) Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit) I want to make an S4 class that use the output object of the function of nls.lm as a slot: setOldClass("nls.lm") setClass ( Class="TestClass",

Hello, I am the maintainer of the stringkernels package and have come across a problem with using S3 objects in my S4 classes. Specifically, I have an S4 class with a slot that takes a text corpus as a list of character vectors. tm (version 0.5) saves corpora as lists with a class attribute of c("VCorpus", "Corpus", "list"). I don't actually need the

I discovered the following behavior when source'ing the same file repeatedly as I edited it. My generic stopped acting like a generic. I can't tell from the docs what, if any, behavior is expected in this case. R 2.4.0 > foo <- function(object) 3 > isGeneric("foo") [1] FALSE > setMethod("foo", "matrix", function(object) 4) Creating a new

Hello, there is an error when building samba with current "samba-4.0.0alpha17" shipped with the sogo/openchange source. The error message is shown below. "&lsquo;struct registry_value&rsquo; has no member named &lsquo;type&rsquo;" is caused by gpo_reg.c in "samba4/source3/libgpo/gpo_reg.c" ??? line: 174: ??????? reg_val.type = REG_SZ;...

Hello everybody [R-2.12.1] I am having difficulty dealing with Oarray objects. I have a generic function, call it foo(), and I wish to define a method for Oarray objects. I do not have or want a method for regular arrays [actually, I want to coerce to an Oarray, and give a warning]. But setMethod() does not behave as desired, giving an error message when I try to define a method for Oarray

Hi, the following Code demonstrates an possibly Error in R (or you can explain me, why this happens, thanks in advance) Code: ##################################### testClass <- function( stackData= c()) { list( write= function( ...) { sChain= "" for( s in c( stackData, ...)) { sChain= paste( sChain, '"', sub( '"',

Late to the show on this release, unfortunately. One of our production packages no longer builds under R-2.15.0 with the following message. ** testing if installed package can be loaded Error: Function found when exporting methods from the namespace 'SuperCurve' which is not S4 generic: 'image' Possibly relevant clues follow: ## From R/AllGenerics.R if

Hi, I'm trying to create a package that contains reference class definitions from which users can create reference objects, but there seems to be something awry. My toy example creates an empty package via package.skeleton('TestClass') to which I add the following R code: TestClass <- setRefClass('TestClass',fields=c('name')) Unfortunately my R console output

I tried the following (relevant excerpt only) setMethod("likelihood", signature(spec="Specification", covs="vector", states="vector"), function(spec, covs, states) { #### setMethod("likelihood", signature(model="Model", path="matrix"), function(model, path) { This

PkgA wishes to write a method for 'unique' on S4 class 'A'. ?Methods indicates that one should setGeneric("unique") setClass("A") unique.A <- function(x, incomparables=FALSE, ...) {} setMethod(unique, "A", unique.A) Both S3 and S4 methods need to be exported in the NAMESPACE import(methods) S3method(unique, A)

pkgA's NAMESPACE has importFrom(graphics, plot) exportClasses("A") exportMethods("plot") R/foo.R has setClass("A") setMethod("plot", "A", function(x, y, ...) {}) During R CMD INSTALL pkgA_1.0.tar.gz we are told ** preparing package for lazy loading Creating a generic function for 'plot' from package

Dear all, I am just writing the documentation file for S4 class 'QualTreeSet' and get the following warning with R CMD check: * checking for missing documentation entries ... WARNING Undocumented S4 methods: generic 'initialize' and siglist 'QualTreeSet' All user-level objects in a package (including S4 classes and methods) should have documentation entries. See the

The Complex group generic for S4 methods is not working: > setClass('foo', representation(z='complex')) [1] "foo" > setMethod('Complex', 'foo', function(z) callGeneric(z@z)) [1] "Complex" > Arg(new('foo', z=1+0i)) Error in Arg(new("foo", z = 1 + (0+0i))) : non-numeric argument to function > The fix is

Apologies for asking something that is probably very obvious, i just started with S4 classes and i guess i am not finding documentation that lays out the grammar rules and gives enough examples. I understand that main method of writing a member function is to write a generic function and setMethod for this particular class. This, however, presumes that there is "virtuality" for this

[cross-posted to R-devel and bioc-devel] Hi, I am trying to implement a 'sort' method in one of the CRAN packages I am maintaining ('apcluster'). I started with using setMethod("sort", ...) in my package, which worked fine. Since many users of my package are from the bioinformatics field, I want to ensure that my package works smoothly with Bioconductor. The problem

If I have a class Foo, then i can write an S3 method for sum for it: >setClass("Foo",representation(a="integer"));aFoo=new("Foo",a=c(1:3,NA)) >sum.Foo <- function(x,na.rm){print(x);print(na.rm);sum(x at a,na.rm=na.rm)} >sum(aFoo) But how do I write an S4 method for this? All my attempts to do so have foundered. For example