similar to: S4 : defining [<- using inheritance from 2 classes

I created some S4 objects that are essentially data frame objects. The S4 object definitions were necessary to verify data integrity and force a standardized data format. I am, however, finding myself redefining all the typical generic functions so that I can still manipulate my S4 objects as if they were data frames ... I have used setMethod to set methods for "subset",

Hi the list I am creating a package and I have a problem to define a S4 method for plot. I define a class 'A' and a class 'B'. I want to define a function plot for signature c(A,missing) and another method plot for signature c(A,B). My code is the following : In /package/R/ directory: --- main.R --- setGeneric("plot",function(x,y,...){standardGeneric("plot")})

Hey everyone, I would like to develop a package using S4 classes. I have to define several S4 classes that inherits from each others as follow: # A <- B <- C <- D I also would like to define .DollarNames methods for these class so, if I have understood well, I also have to define an old class as follow: # AOld <- A <- B <- C <- D setOldClass(Classes = "AOld")

Hi, I created a class (S4) with some slots like value, date, description (it's actually a financial transaction class). Now I need a method to convert this class forth and back into a single row data.frame, where every slots represents a column. This method looks at the moment like this: > setMethod("as.data.frame", "Transaction", function(x, row.names =

Hi, I found the following on Windows 2000/NT R Version 1.9.1 (2004-06-21) (also Version 1.9.0): The S4 group "Math" doesn't work as documented; i.e., "log", "log10", "gamma" and "lgamma" are included in the documentation but don't work. See example code below. Moreover, what about 'genericForPrimitive' which is used in

I looked through the documentation and the mailing lists and could not find an answer to this. My apologies if it has already been answered. If it has, a pointer to the relevant discussion would be greatly appreciated. Creating S4 classes containing environments exhibits unexpected behavior/features.? These have a different in two ways: 1) slotName for the data: ".xData" instead of

i think these two code snippets exhibit a bug. they are identical but for the inclusion of an initial line in snippet [2] [1] setMethod("Math", signature(x = "numeric"), function(x) "Works") getGeneric("sqrt")(4) [2] getGeneric("sqrt")(4) setMethod("Math", signature(x = "numeric"), function(x) "Works")

Dear Developers, In current implementation of validity method, objects are first coerced to superclass (slots are striped). Thus, it is not possible to write validity method which would perform some checks on children slots. Say, I want to check if number of slots in a class is equal to "n": setClass("A", representation(a="numeric", n="integer"),

Hello. I am trying to write an S4 method for rbind(). I have a class of objects called 'mdm', and I want to be able to rbind() them to one another. I do not want the method for rbind() to coerce anything to an mdm object. I want rbind(x1,x2,x1,x2) to work as expected [ie rbind() should take any number of arguments]. This is what I have so far: setGeneric(".rbind_pair",

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)

Hi the list I define a class A (slot a and b), a class C (slot c and d) and a class E that inherit from A and B. I define print(A) and print(B). For print(C), I would like to use both of them, but I do not see how... Thanks for your help... Christophe ---------------------------------------------------------------- Ce message a ete envoye par IMP, grace a l'Universite Paris 10 Nanterre

Hi the list, With basic type, length gives the length of the vector Wtih list, length gives the number of item With S4 object, length gives...one. Even with an objet with empty slot. setClass("E",representation(e="numeric")) [1] "E" length(new("E")) [1] 1 setClass("E",representation(e="matrix")) [1] "E"

Hello, With R version 3.0.2 Patched (2013-10-30 r64123) I don't see warnings that I get in R Under development (unstable) (2013-11-03 r64145) The warnings are like : Undocumented S4 methods: generic '[' and siglist 'BayMethList,ANY,ANY' The function actually looks like : setMethod("[", "BayMethList", function(x, i) { # Code to subset object. }

I feel tedious when I define a S4 class and the methods. For each method, I have to call both setMethod and setGeneric (or both setReplaceMethod and setGeneric). I would like a more compact grammar so that I can reduce the key strokes. I'm wondering if there is a better way available. setClass( Class='A', representation=representation( x='numeric' )

Hi the list When two setGeneric occurs on the same function, the second erage the first and erase all the function previously define. Is it possible to prevent that ? Is it possible to declare a setGeneric that can not be erased later ? Something like the |sealed for setMethod...| || |Thanks| || Christophe

On Jan 28, 2015, at 6:37 PM, Michael Lawrence <lawrence.michael at gene.com> wrote: > At this point I would just due: > > formals(body(method)[[2L]]) > > At some point we need to figure out what to do with this .local() confusion. Agreed, definitely. The current hack is to avoid re-matching arguments on method dispatch, so a fix would need to be fairly deep in the

I wish it didn't have to depend on the name '.local'. Back when I wrote a lot of S4 methods I avoided the auto-generated .local and named the local function something that made sense so that is was easier for a user to track down the source of an error. E.g., define the generic QQQ with numeric and integer methods: setGeneric("QQQ", function(x, ...)NULL)

Hi, I'm trying to create a new S4 class (myMatrix) which for now just extends dgCMatrix (from package Matrix). Then I want to use "[" which is defined in Matrix. Out of the box with "[" (defined in Matrix) I lose the class information and the result is an object of class dgCMatrix. If I specify a "["-method for myMatrix, it is not used because a signature

Hello, ?as.character says that the as.character function is a generic with usage: as.character(x, ...). So, I want to create an S4 object with an as.character method following the above usage, but I get the below error telling me that ... isn't in the generic for as.character. > setClass("tmp", "numeric") > setMethod("as.character", "tmp",

Hello, ?as.character says that the as.character function is a generic with usage: as.character(x, ...). So, I want to create an S4 object with an as.character method following the above usage, but I get the below error telling me that ... isn't in the generic for as.character. > setClass("tmp", "numeric") > setMethod("as.character", "tmp",