similar to: setAs vs setIs

Hello, am I using 'setIs' in the correct way in the subsequent (artifical) example? Do I have to specify explicit 'setAs' for 'list' and 'vector' or should this work automatically, since "getClass("List1")" states an explicit coerce also for these classes. I'm working with R 2.0.0 Patched (2004-10-06) on windows 2000. Thanks for your

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 list, I've got a class B that contains a slot obj of class A. I'd like to be able to call all the methods of class A directly on objects of class B as if I had called the method on slot obj. This without overloading all methods of class A to work on class B. I don't define B as an extension of A, because I want class B to also work with objects of classes that inherit from

Dear all, I have a question regarding setIs and method dispatch in S4 classes: Consider the following example: ##################################################### ## A02 "contains" A01 by setIs: setClass("A01", representation(a="numeric",b="numeric")) setClass("A02", representation(a="numeric",d="numeric"))

(I am not sure if this is a bug or a request for a more understandable warning, or possible something obvious I should be posting on r-help.) I am trying to coerce an new class object to be a DBIConnection and it does not work the way I think it should: R version 2.5.1 (2007-06-27) ... > require("RMySQL") # or require("RSQLite") Loading required package: RMySQL Loading

I've recently updated from an early February version of 1.7.0 to Version 1.7.0 Under development (unstable) (2003-03-25) and am now having problems with errors giving the message: ' getExtends(ClassDef) : @ must be used on an object with a formal class' which seems to be caused by 'setIs("character","character or NULL")' which attempts to define

Hi, I would like to create some S4 classes as follows setClass("Father",representation(name="character")) setClass("Son1",contains="Father",representation(par="numeric")) setClass("Son2",contains="Father",representation(par="logical")) Son1<-new("Son1") Son1 at name<-"Son1" Son1 at par<-3

By reading the documentation for _setIs_ I noted that for the same object three different names are used. 1) the name of the first argument in the functions coerce and replace in setIs must be _obj_ (see example section or) setIs("MVCa","list",coerce=function(obj){obj@list},replace=function(obj,value){obj@list<-value}) 2) At the same time in the usage section:

Andreas, As far as I can tell (/conjecture), this is because the list of classes a particular class inherits from directly is appended to as needed, and so the order that a class extends others isd refined by the order that those connections are defined. We can see this with two setClassUnion calls, rather than required setAs: > setClass("grandma", slots = c(a =

Hi, Please consider the following trivial example. In the sample code I first define a class MVCa using composition. This class contains a slot of type list. Next I define an inheritance relation using the function setIs -> MVCa "is a" list. Then I define a function printlength which prints the list-length which is defined for the type "list". If I call this function

I'm trying to resolve a small problem that has arisen from introducing a NAMESPACE for the package SparseM. Prior to the namespace I had a class "matrix.diag.csr" that consisted of diagonal sparse matrices. It was defined to have the same attributes as the matrix.csr class and setAs was used to define how to coerce integers and vectors into this form:

I ran into a problem recently trying to update a package which uses S4 methods using a recent beta of R. I think I can reproduce it with a simple example. I have package called `testpkg' in directory testpkg/. In the R/ subdirectory of testpkg/ I have a file called testpkg.R which contains the following two lines: setClass("testpkg", representation(pts = "list"))

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", +

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

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 fredhutch.org>> wrote: > > Hi, > > Short story > ----------- > > setClassUnion("ArrayLike", "array") > > showClass("ArrayLike") # no slot > >

Dear listmembers, I would like to define a class with a slot that takes either an object of class aov or NULL. I have been reading "S4 Classes in 15 pages more or less" and "Lecture: S4 classes and methods" #First I tried with list and NULL setClass(listOrNULL") setIs("list", "listOrNULL") setIs("NULL", "listOrNULL") #doesn't

Hi, It doesn't seem that the dispatching algo is finding my coerce method under some circumstances. Let's say I have 2 classes, A and AA and that AA is just a direct extension of A with no additional slots: setClass("A", representation(ii="integer")) setClass("AA", contains="A") I can define a method for coercing my objects to an integer

I'm trying to create a package for working on orientation data, i.e. data where the observations are 3D rotations. There are several different representations of orientations in common use: SO(3) matrices, Euler angles, unit quaternions, etc. One thing I'd like is to make it convenient to work in any representation, and have conversions to others done as needed. I'm trying to do

In the little orientation data package I'm working on, the very first example fails, even though the same code works when used in a regular session. In my experience, this usually indicates T or F has been used instead of TRUE or FALSE, but that's not the case this time. The error message is > x <- eulerzyx(1,0,0) Error: Trying to get slot "validity" from an object of

Full_Name: Colin A. Smith Version: 1.8.0 OS: Mac OS X 10.2.6 Submission from: (NULL) (128.102.184.81) annaffy 1.0.1 (in BioC CVS) fails to load. annaffy 1.0 (on the BioC web site) has the same problem. It looks like the load is failing because of a bug in completeSubclasses() in r-devel. It calls setIs() and doesn't specify an environment via the "where" argument. setIs()