similar to: S4: names stripped during instantiation of grandchildren of numeric class

Dear Developers, In current implementation of validity method, objects are first coerced to superclass (slots are striped). Thus, it is not possible to write validity method which would perform some checks on children slots. Say, I want to check if number of slots in a class is equal to "n": setClass("A", representation(a="numeric", n="integer"),

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

Dear UseRs, Does anyone know when exactly the validity is checked in S4? Documentation is silent:(. Here is a small example: setClass("test1",representation(a="numeric")) setMethod("initialize","test1", function(.Object,...){ a<-runif(1) ## here slot "a" is initialized ## callNextMethod(.Object,a=a,...)

From: Vitalie S. <vitosmail <at> rambler.ru> Subject: Bug in cut.POSIXt Newsgroups: gmane.comp.lang.r.general Date: 2009-10-15 15:47:48 GMT (1 hour and 29 minutes ago) Hello Everyone, Before reporting decided to post here first: tt <- structure(c(1254238817, 1254238859, 1254238969, 1254239080), class = c("POSIXt",

Dear useRs, Here is a weird behavior of transform function: mtcars1<-matcars transform(mtcars1,t1=3,t2=4) Error in data.frame(`_data`, e[!matched]) : arguments imply differing number of rows: 32, 1 instead, this works: mtcars1$t1<-0 transform(mtcars1,t1=3,t2=4) also works if applied in turn: transform(mtcars1,t1=3) transform(mtcars1,t2=4) I often need to use this

Hello everyone, I am trying to implement completion for proto objects. Proto extends environment in a hierarchical way. Thus completion should list all the names in all it's parent environments. For "normal" classes defining names.class would do the job, but completion for "environment" is hard coded in utils:::specialCompletions by means of base::ls(). As result

Hello, Is there a way to access function's slots from inside the function? I want to make functions slot dependent without recurring to generic function mechanism. Probably this goes a bit against R philosophy, but otherwise I don't really see the use of extending functions in R. Would be nice to have something like:

Full_Name: Spinu Vitalie Version: 2.9.0 OS: Windows Submission from: (NULL) (130.115.113.15) In assignment of "zero length" names to data.frame: > tdf <- data.frame(rbind(c(1, 2), c(1, 2))) > names(tdf) <- c("", "") > tdf structure(c("1", "1"), class = "AsIs") structure(c("2", "2"), class =

can list names attributes be preserved through S4 class containment? seems to be so but only if the containment relationship is direct ... see below. > setClass("c1", contains="list") [1] "c1" > l1 = list(a=1, b=2) > o1 = new("c1", l1) > names(o1) # pleasant surprise [1] "a" "b" > setClass("c2",

Dear Developers, I wonder what are the parent.frame rules for methods. For ordinary functions one can call parent.frame() and be sure that it is the environment of a calling function. With S4 aparently it is not the case. Here is what I have discovered by trial and error so far: > setClass("A", contains="vector") [1] "A" > setGeneric("foo",

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, I experienced a strange behaviour of callNextMethod when used in either initialize or any other S4 function method definition. Help says callNextMethod calls the next inherited method for the current function from where it is called with the same actual (non missing) arguments. This is OK. The problem appears when some formal arguments (in particular, S4 objects) of this function are

Support Requests item #8957, was opened at 2007-02-28 13:47 You can respond by visiting: http://rubyforge.org/tracker/?func=detail&atid=412&aid=8957&group_id=85 Category: win32-process Group: None Status: Open Resolution: None Priority: 3 Submitted By: Chad Woolley (thewoolleyman) Assigned to: Nobody (None) Summary: Killing grandchildren? Initial Comment: I am trying to spawn, then

Support Requests item #8957, was opened at 2007-02-28 13:47 You can respond by visiting: http://rubyforge.org/tracker/?func=detail&atid=412&aid=8957&group_id=85 Category: win32-process Group: None >Status: Closed >Resolution: Rejected Priority: 3 Submitted By: Chad Woolley (thewoolleyman) Assigned to: Nobody (None) Summary: Killing grandchildren? Initial Comment: I am trying

I have a table hierarchy like so: sites->items->comments I''d like to be able to do this in templates: <% for comment in @site.comments.find(:all, order=>''timestamp desc'') %> I''ve tried all the various permutations of ''has_many'' in site.rb I can think of, but can''t get it to work. I''m not even sure if

Can anyone with Heimdal KrbV verify this? -------------- next part -------------- An embedded message was scrubbed... From: Dag-Erling Smorgrav <des at ofug.org> Subject: Kerberos buglet in OpenSSH-3.3p1 Date: 25 Jun 2002 14:52:10 +0200 Size: 1291 Url: http://lists.mindrot.org/pipermail/openssh-unix-dev/attachments/20020626/347e123e/attachment.mht

Conrad, Small buglet with the 0.9.1 liboggz release (go dude!) http://thaumas.net/~giles/xiph/elphel/clips/elphel_00017.ogg causes a float exception in oggzinfo when it tries to calculate the bitrate. It fails to measure the duration and tries to divide by zero. :) There may well be something wrong with the file, although oggz-validate doesn't complain. Also, the configure script

setClass("B", representation=representation("B", extra="numeric)) setClass("B", representation=representation(extra="numeric"), contains="B") Are these the same? If not, how do they differ? What about setClass("B", representation=representation("B", extra="numeric"), contains="B") ? As far as I can

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

Initialization of this simple hierarchy A = setClass("A", representation(x="numeric")) setClass("B", contains=c("VIRTUAL", "A")) C = setClass("C", contains="B") fails (neat that setClass returns generators; I hadn't realized that before!) > C(A()) Error: evaluation nested too deeply: infinite recursion /