similar to: creating a package with internal (hiden) S4 classes and methods

Dear List Members, I'm struggling with the documentation of a generic S4 replacement method. I've created a S4 method "lows" via setGeneric("lows", function(object) standardGeneric("lows")) setGeneric("lows<-", function(object, value) standardGeneric("lows<-")) setMethod("lows", "myClass", function(object) {

Hi helpers, I've been programming in R for a few months now but I still have doubts about my code - I would like it to be completely S4-compatible. The current code works fine but is probably 'unclean'. I read the interesting article in the last R News and it helped me understand the difference on the whole between S3 and S4 classes, but I need a practical example. Could anyone

Dear all, Assume that I have an S4 class "MyClass" with a slot "myname", which is initialized to: myname="" in method("initialize"): myclass <- new("MyClass", myname="") Assume that class "MyClass" has a method "mymethod": "mymethod.MyClass" <- function(object, myname=character(0), ...) {

Dear listers, I am making a trial to move from S3 to S4... I have created some classes of interest and they work acceptably well for the purpose. I am now wondering how to make them operate in a package. In clear when a package is loaded (eg library(mypackage)) where should I put the class descriptions:

Dear all, Since my package is based on S4 classes, I would like to know how to add a slot to an existing S4 class without breaking the code of users of my package. Assume the following S4 class: setClass("MyClass", representation(name = "character", type = "character", data = "data.frame" ), prototype(name =

For documentation we use a system that generates Rd files from special comments in the code. (inlinedocs). It is crucial to be able to get the defining source code for objects like methods to extract the comments from it. Here is an R session that shows how this works for several kinds of methods and (at the end of the session) how if fails for methods of "initialize" >

The %*% function is a primitive. As it says in the documentation under ?Methods_Details Methods may be defined for most primitives, and corresponding metadata objects will be created to store them. Calls to the primitive still go directly to the C code, which will sometimes check for applicable methods. The definition of ?sometimes? is that methods must have been detected

Hi all, I'm trying to implement the matrix multiplication operator, which is S4 generic, for an old-style S3 class. The following works as expected: x <- 1:10 class(x) <- "myClass" setOldClass("myClass") setGeneric("myMethod", function(x, y) standardGeneric("myMethod")) setMethod("myMethod", c("myClass", "myClass"),

I need some help in defining a "print" method for my new S4 class definition. So fer I have worked like this: setClass("MyClass", sealed=F, representation(slot1 = "list", #create a new class slot2 = "vector", slot3 = "vector", slot4 = "vector")) setMethod("print",

>>>>> Ezra Tucker >>>>> on Mon, 11 Nov 2019 21:47:41 +0000 writes: > Hi all, > > I came across an issue in using the Matrix package which made it that I > could only subset Matrices using the numeric class, but could not using > integers. Steps to reproduce the problem: > > library(Matrix) > > # this class has *nothing* to do with

A general goal for the next version of R is to make S4 and S3 play better together. As mentioned in a previous thread, one limitation has been that S3 generic functions, specifically the UseMethod() call, did not make use of S4 inheritance when dispatching on general S4 objects. This has been fixed in a version committed today (updated to rev 52267). The code change is not large, but it

Following my previous post on S3 method despatch, I put debug messages in the code of Axis, Axis.default and plot.default in graphics/R/axis.R and graphics/R/plot.R to print the class of x, at and y on plot. After recompiling R, what I see is that x *lost* its class attribute (at least for classes not known to 'graphics') in Axis, called directly from plot.default and this could be the

Hi all, I came across an issue in using the Matrix package which made it that I could only subset Matrices using the numeric class, but could not using integers. Steps to reproduce the problem: library(Matrix) # this class has *nothing* to do with Matrix setClass("MyClass", representation(myvalue = "numeric"), prototype(myvalue = NA_real_)) # this class also has

Hello all... I'm trying to create a simple language that supports classes using the OCaml API. When I use the web page demo to produce the intermediate code for the following C++ example ... class MyClass { public: MyClass(); int c; }; MyClass::MyClass () { c=55; } ...I get something like this .... %class.MyClass = type { i32 } @MyClass::MyClass() = alias void (%class.MyClass*)*

Dear all, I have created a new S4 class with name "MyClass". Please see below for it's definition. Now I want to create a method for the show() function for this class. In defining this method, what I want is, once user would like see an object of this class some values will be displayed. Then R will ask for **press Enter**. Once user presses enter then, remaining values will be

Hi, I have been going crazy over the last few weeks trying to install a new Samba server (using v2.2.1, v2.2.5 and v2.2.6) to replace a old system. Problem seems to be with file locking on the new server - works perfectly on old server!! Attached are configuration files for Samba for old (smb205.conf) and new (smb226.conf) servers, plus the source of a Cobol test program (samtest.cbl) that

Hi, I ran into the following peculiarity involving S4 method dispatch and namespaces. I develop a package which have a namespace and which depends on 'pixmap' package, which itself does not have a namespace. Now, in my package I have a class which has a slot for objects from class "pixmap" and I want to have a "plot" method for this new class. Not to clutter the

Hi- I used to use "<<-" to do assignment inside a class method, and just found that now it is broken in R 2.0. For example, the following code ----------------------------------------------------------------------- setClass( "myclass", representation(x="numeric") ) setGeneric("incrXByOne", function(obj) standardGeneric("incrXByOne"))

I'm using R 1.8.1 (Win32, Linux) and have some difficulties using validation functions for S4 classes. The problem is if I specify a validation function with setValidity("myclass", validate.myclass) object validation is only performed when I create an instance using new("myclass"), or when I explicitly call validObject(x) where x is of class "myclass", of

Dear list, here is a problem I met when trying to use a method for an S4 object, without loading the package in which the method was defined. I do not know if this is a bug, or a mistake of mine. Normally, I think the package in which the appropriate method is defined is loaded automatically when calling the method. The problem is that if the package is indeed loaded automatically, the