similar to: Possible bug in `class<-` when a class-specific '[[.' method is defined

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

Pasting the entire example into RStudio and hitting return to evaluate does not show this. Evaluating the finall line to print counttt separately does. Looks like RStudio is calling `[[` on your object when examining the environment for the Environment panel. If this concerns you then you should contact RStudio. Best, luke On Mon, 15 Jul 2019, Rui Barradas wrote: > Hello, > > Clean R

Hello, Inline. ?s 14:26 de 15/07/19, Duncan Murdoch escreveu: > On 15/07/2019 8:57 a.m., Rui Barradas wrote: >> Hello, >> >> Clean R 3.6.1 session on Ubuntu 19.04, RStudio 1.1.453. sessionInfo() at >> the end. > > That's not what I'd call a "clean session" with all those packages loaded: You are right, but when I wrote that it *was* clean.

I recently tried to write a new method for "[", to be applied to data frames, so that the object returned would retain (all) attributes of the columns, including attributes that my code had created. I thrashed around for quite a while, and then got some help from Rui Barradas who showed me how to do it, in the following manner: `[.myclass` <- function(x, i, j, drop = if

Frequently we have a print method, say print.myclass, that has a variety of arguments. If in the .Rd file I say \usage{ \method{print}{myclass}(x, myarg) } I get a warning when running R CMD chk: * checking generic/method consistency ... WARNING print: function(x, ...) print.myclass: function(x, myarg) What is the proper way to handle this? Thanks -- Frank E Harrell Jr

Hi! I have implemented class specific behaviour of "[[<-.myclass"<-function(). How it is posible to call the "[[.default" on an object of myclass? Eryk Dipl. bio-chem. Eryk Witold Wolski @ MPI-MG Dep. Vertebrate Genomics Ihnestrasse 73 14195 Berlin 'v' tel: 0049-30-84131285 / \ mail: wolski@molgen.mpg.de ---W-W----

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

On 4/11/19 10:31 AM, Duncan Murdoch wrote: > On 03/11/2019 4:11 p.m., Rolf Turner wrote: >> >> I recently tried to write a new method for "[", to be applied to data >> frames, so that the object returned would retain (all) attributes of the >> columns, including attributes that my code had created. >> >> I thrashed around for quite a while, and

Dear list, I wonder how to write methods for the function 'as' in the sense that I can call 'as(object, Class, strict=TRUE, ext)' and let method dispatch figure out the correct method. AFAIU, there is a difference between, e.g. 'as.data.frame' and the methods of 'as()' as stated above since the former depends on arg 'x' instead of 'object',

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 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 =

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

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

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

hello all Im new to ruby and im just trying to see how i can instanciate an object that is defined in a class file like myclass.rb then in another file like start.rb i just call it like so newObj = myclass.new do i need the include statement at the top? like include myclass.rb or mayby the require statement? Thanks -- Posted via http://www.ruby-forum.com/.