similar to: setClassUnion with numeric; extending class union

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

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

Dear list: I would like to override the default way R formats plot axes with a custom method(s). Obviously I would prefer to define it as general as possible avoiding writing a custom method for each individual class where possible. The plot.default method (and I assume other methods as well) calls Axis(...) to produce the axis layout depending on data. In this sense it seems reasonable to

I'm trying to create a formal class that does the following: 1) accept objects of arbitrary class as .Data slot 2) provide a set of other slots that are of fixed type (as usual) The following two approaches came to my mind: A) setClass("myclass", representation("ANY", x = "numeric", y ="numeric")) new("myclass", 1:10) # works

>>>>> 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

Dear John and Seth, dear R-devels, once again the question of method dispatch in S4 -- this time with setClassUnion(); taking up your advice in https://stat.ethz.ch/pipermail/r-devel/2006-April/037200.html https://stat.ethz.ch/pipermail/r-devel/2006-April/037201.html I have been too quick in stating that >setClassUnion()---at least in my case---solves the problem; > The problem arises

I am trying to create a class union of class unions to facilitate method dispatch. When I execute code in the global environment, everything acts as expected, however when I put the same code in the context of a package, selectMethod can no longer find the correct method. This first block below puts the code in the context of a package: fn <- "codefile.R" writeLines( c(

Hello, I have a question concerning "setClassUnion". I'm working with R 2.0.0 Patched (2004-10-06) on windows 2000. I tried to use "setClassUnion" in a package I am currently working on. The situation is similar to the following example: The DESCRIPTION file has entries: Depends: R (>= 2.0.0), methods Imports: methods LazyLoad: yes The NAMESPACE file has

Hello, I have a question concerning "setClassUnion". I'm working with R 2.0.0 Patched (2004-10-06) on windows 2000. I tried to use "setClassUnion" in a package I am currently working on. The situation is similar to the following example: The DESCRIPTION file has entries: Depends: R (>= 2.0.0), methods Imports: methods LazyLoad: yes The NAMESPACE file has

Thanks, I'll look into it. On Tue, Feb 18, 2020 at 8:32 AM Ezra Tucker <ezztucker at gmail.com> wrote: > > Hi Robert, > > This looks like a bug to me (tested in R 3.6.2 on Windows), f(new("a")) > should return "hi!". I'll add that this DOES work properly in 3.6.1 > which leads me to suspect this could be due to the subtle change in the > way

Okay - that makes sense and thanks for looking into this! As an aside, from R-devel's perspective would you say methods are stabilizing again or do you foresee a lot of changes coming in the 4.* series? On Tue, Feb 25, 2020 at 3:39 PM Michael Lawrence via R-devel < r-devel at r-project.org> wrote: > This seems to work as expected (returning "hi!") in R-devel, but there

Dear colleagues, there is a behaviour with S4 (virtual) classes that I find very hard to understand: Depending on the position of setAs(), the tree of inheritance changes. This is my baseline example that defines the classes "grandma", "mother", "daughter" and a virtual class "mr_x". For a new instance if "daughter", "mr_x" is betweeen

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",

Dear developers: I have observed a change in the behaviour of S3 method despatch (as I guess related to namespaces) between 2.6.2 and yesterday's 2.7.0 RC and would be grateful if you could comment on that: the 'Axis' function in the 'graphics' namespace calls UseMethod("Axis",x), internally to despatch on the S3 Axis method depending on the type of the argument.

Dear list: is there any good reason why 'c', 'cbind', 'rbind' etc (all defined as 'function(..., <rest>)') are generic and thus methods can be defined whereas such quite useful functions like 'cat' and 'write' are not? Would it not be reasonable to add such functionality? This would allow to define S3/S4 methods for cat and write for complex

Dear John and others, I've been wondering about whether there's any way to indicate a "nil" reference class object, which will represent "no value", and be tested for, but not fail the internal type checking. NULL is the obvious choice (or seems so to me), but can only be used if an explicit class union is created: > Foo <- setRefClass("Foo") > Bar

Hi, Short story ----------- setClassUnion("ArrayLike", "array") showClass("ArrayLike") # no slot setClass("MyArrayLikeConcreteSubclass", contains="ArrayLike", representation(stuff="ANY") ) showClass("MyArrayLikeConcreteSubclass") # 2 slots!! That doesn't seem right. Long story ----------

On 03/19/2016 01:22 AM, Michael Lawrence wrote: > > > On Sat, Mar 19, 2016 at 12:10 AM, Herv? Pag?s <hpages at fredhutch.org > <mailto:hpages at fredhutch.org>> wrote: > > On 03/18/2016 03:28 PM, Michael Lawrence wrote: > > > On Fri, Mar 18, 2016 at 2:53 PM, Herv? Pag?s > <hpages at fredhutch.org <mailto:hpages at

Dear list. It is a known issue that accessing slots of S4 objects and in particular accessing .Data slots is slow in R. However, what surprises me are two things demonstrated in the code below (runnable with 'inline', my times are in the comments): - copying data out of a large 3x1e7 .Data slot into a matrix can be easily made 3-4 times faster than accessing a .Data slot which I believe

Dear List: Sorry for posting maybe a trivial question, but I have a basic understanding problem. If I have say pack1 and pack2, two R packages, and pack2 depends on and imports pack1 fully (as in the code below), is there a way to make all the functionality of pack1 available for the global and other environments (not only for the functions called from withing pack2) by loading pack2 only? I