similar to: include a class file for access to an object

Hi, I experience a very strange behaviour when trying to instanciate a S4 class. A call like 'r <- new("MyClass", foo="bar")' returns apparently cleanly, but in fact a subsequent use of 'r' results in a 'r does not exist error message'. After a bit of hunting with 'debug', it seems that the bug is in 'initialize' (or one of the

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), ...) {

I''m testing the http module in console. BUt I got the following error. Anyone knows why? >> Net::HTTP.get_print ''www.google.com'', ''index.html'' SystemStackError: stack level too deep from C:/InstantRails/ruby/lib/ruby/1.8/net/http.rb:451:in `newobj'' from C:/InstantRails/ruby/lib/ruby/1.8/net/http.rb:451:in

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 =

Hi all ! I noticed a strange behaviour of the function `class<-` when a class-specific '[[.' method is defined. Here below a reproducible example : #-------------------------------------------------------------------. counttt <- 0 `[[.MYCLASS` = function(x, ...) { counttt <<- counttt + 1 # browser() x = NextMethod() return(x) } df <- as.data.frame(matrix(1:20,

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

Sorry in advance if this is too simple a question, but I'm stuck with some odd behavior and I can't find the text to rid myself of this (admittedly somewhat trivial) problem. Note that I've done generic programming with S3 "objects" in the past, but I've never really dabbled in creating S4 objects until now. So, I've created a new S4 class, call it

Dear list: I am looking for a good way to create an S4 class that would extend numeric, but would allow NULL instead of data as well. As far as I can see there is no way at the moment to do that, but please correct me if I am wrong. The best solution I came up with so far was the following (it also indicates a problem of using setClassUnion with numeric as one of the classes): I define a class

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

Hello, Clean R 3.6.1 session on Ubuntu 19.04, RStudio 1.1.453. sessionInfo() at the end. I can reproduce this. counttt <- 0 `[[.MYCLASS` = function(x, ...) { counttt <<- counttt + 1 # browser() x = NextMethod() return(x) } df <- as.data.frame(matrix(1:20, nrow=5)) class(df) <- c("MYCLASS","data.frame") counttt #[1] 9 But there's more. I

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"),

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"))

Hi How can I specify that a private method of a class gets called? If you run the code below, only spec (1) passes. Spec (2) is what I found causing problems in my code, and class (3) is my failed attempt to work around it. (3 really puzzles me - why is a private class method not accessible via send?) Another problem is that stub! makes public methods, which changes the behaviour of

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

Dears, I have a question about copying reference objects using the initialize method. 1) If the latter has no arguments, there is no problem to copy an object. myClass = setRefClass("myClass", fields = list(value = "numeric") ) myClass$methods(initialize = function(...){ ? value <<- 1 ? callSuper(...) }) newObject = myClass$new() newObject$value = 2 copyObject =

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",

Hi everybody! I have a matrix of class "myClass", for example: myMat <- matrix(rnorm(30), nrow = 6) attr(myMat, "class") <- "myClass" class(myMat) When I extract part of ''myMat'', the corresponding class ''myClass'' unfortunately disappear: myMat.p <- myMat[,1:2] class(myMat.p) Please for any advice / suggestions, how

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

I have class in a plugin that I want to crack open and add some functionality to for a particular application. So, I created a file by the same name as the class in my app/models folder and added some methods to the class, but, I can''t seem to get Rails (2.2.2) to pick-up the extended definition. I did find while trying to debug the problem that if I paste the extended definition into,

Dear all, I am currently learning how to create R packages using C++ classes. For this purpose I have written a small package MyClass (which I try to attach since I do not have access to a website). MyClass has methods WriteFileC() and WriteFileCpp() which implement C-style and C++-style writing of a table to a file using FILE or ofstream respectively, and the corresponding R-functions