similar to: S4 setClass with prototypes " issues" (PR#8053)

Displaying 20 results from an estimated 9000 matches similar to: "S4 setClass with prototypes " issues" (PR#8053)"

2010 Feb 02
1
S4 setClass / initialize misunderstanding
Hi, I recently ran into this problem. I couldn't find any mention of it in the setClass documentation. setClass("Foo", representation(file = "character")) setMethod("initialize", "Foo", function(.Object, file) { print(file) }) setClass("Bar", contains = "Foo") And the error: Error in print(file) : argument "file" is
2003 Jun 24
1
S4 method setClass prototype definition question
Dear list, this is not a problem report -- I would like to ask for advise what the recommended and safe way to perform the following is or what problems might arise in doing it differently. The question is: What is the recommended way of providing a default value in a prototype statement for a derived class for a slot provided from a parent class? I have first consulted the methods package
2009 Jul 09
1
class export in package creation / setClass / namespace?
Dear all, I have been trying to create an R package. This has been successfull until I tried to define classes. Currently, my procedure is the following: Start R, load the function and class definition >tmp <- function (x) {x} >setClass("rpa", contains = "list", where=topenv(parent.frame())) Use package skeleton to create directory structure:
2008 Dec 22
1
How to add a slot to S4 class of an existing package?
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 =
2009 Jun 05
1
S4: Initialization method called during setClass??
Dear UseRs, A simple class inheritance example: > setClass("test",representation(a="numeric")) > setMethod("initialize","test", function(.Object,x,...){ print("Initialization!!!") callNextMethod(.Object,a=x,...) }) > new("test",x=23) [1] "Initialization!!!" An
2008 Feb 17
1
NAMESPACEs and S4 classes
I'd like to have two packages with S4 classes with the same name but different implementation. To that end I create a package tmpA with setClass("A", representation=representation( x="numeric"), sealed=TRUE) setClass("B", representation=representation( x="numeric")) B <- function(...)
2011 Jun 06
1
Seeking help to define method for show() for an S4 object
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
2011 Feb 01
1
Help need to define method of an s4 class
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",
2009 Feb 11
1
setClassUnion with numeric; extending class union
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
2014 Jan 07
1
Why do methods of "initialize" have no "srcref" attribute as other S4 mehtods?
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" >
2019 Nov 11
2
Troubles using numeric in s4 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
2019 Jan 10
2
setClass accepts slot-mismatch between slots and prototype arguments
I was installing the 'diffobj' package into TERR and got an error from the call StyleSummary <- setClass("StyleSummary", slots=c(container="ANY", body="ANY", map="ANY"), prototype=list( container=function(x) sprintf("\n%s\n", paste0(x, collapse="")), body=identity, detail=function(x) sprintf("\n%s\n",
2009 May 13
1
question about setClass
Hi R People: I have a question about setClass please. I'm working thru "R Programming for Bioinformatics". Actually, I was wondering if there is such a thing as an updateClass, in order to change a "contains" option, please? that is, if I had setClass("dog", representation(name="character",paws="numeric",tail="character")) Fair
2005 Nov 22
1
failure in `setClass' examples
Hello, Below is what I got running the examples from `setClass'. Could somebody please help explain why the last `setIs' call is returning the warning and whether this is expected? R> setClass("track", + representation(x="numeric", y="numeric")) [1] "track" R> setClass("trackCurve", +
2009 May 18
1
S4 method dispatch and namespaces: why is default method selected
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
2002 May 21
4
setClass() and packages
Where should the setClass() ('methods' package) calls be placed in a package? I try to follow a one-class-one-file principe, but since setClass("ClassA", "ClassB") has to come a after setClass("ClassB", [snip]) it is not possible to fully follow this rule. So the best I can do now is to put all setClass() calls in a file named "000.R" (I know this
2009 Mar 29
1
Recent setClass fails where previous succeeded
These lines of code setClass("A", representation(x="numeric")) setMethod(initialize, "A", function(.Object, ...) stop("oops")) setClass("B", representation("A")) result in > setClass("B", representation("A")) Error in initialize(value, ...) : oops in R version 2.9.0 alpha (2009-03-28 r48239) R version 2.10.0
2012 Feb 15
1
Cannot use setClass() in Rscript
Greetings, I am creating a standalone executable script using Rscript and have run into problems when I define a new S4 class. Here is a small script that demonstrates my problem: #!/usr/bin/env Rscript # # toy.Rscript -- testing S4 class creation in an Rscript setClass("toy", representation(name = "character", price = "numeric"),
2004 Feb 24
1
Inheriting from factors + co.
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
2007 Apr 19
2
setClass inside a function
Hello, I would like to create a function that gets passed a class name and then calls setClass, and a few other functions, inside. I have done this in the past with setmethod, creating accessors for all slots in a set of S4 classes. But setClass is choking when my function is called isnide a package, telling about an error in exists(cname, where). I assume this to be a problem with the