similar to: binary form of is() contradicts its unary form

Hi Mehmet, On 11/29/2017 11:22 AM, Suzen, Mehmet wrote: > Hi Herve, > > I think you are confusing subclasses and classes. There is no > contradiction. `is` documentation > is very clear: > > `With one argument, returns all the super-classes of this object's class.` Yes that's indeed very clear. So if "list" is a super-class of "data.frame" (as

Yes, data.frame is not an S4 class but is(data.frame()) finds its super-classes anyway and without the need to wrap it in asS4(). And "list' is one of the super-classes. Then is(data.frame(), "list") contradicts this. I'm not asking for a workaround. I already have one with 'class2 %in% is(object)' as reported in my original post. 'is(asS4(object), class2)'

Hi Herve, Interesting observation with `setClass` but it is for S4. It looks like `data.frame()` is not an S4 class. > isS4(data.frame()) [1] FALSE And in your case this might help: > is(asS4(data.frame()), "list") [1] TRUE Looks like `is` is designed for S4 classes, I am not entirely sure. Best, -Mehmet On 29 November 2017 at 20:46, Herv? Pag?s <hpages at

Hi Herve, I think you are confusing subclasses and classes. There is no contradiction. `is` documentation is very clear: `With one argument, returns all the super-classes of this object's class.` Note that object class is always `data.frame` here, check: > class(data.frame()) [1] "data.frame" > is(data.frame(), "data.frame") [1] TRUE Best, Mehmet On 29 Nov

2017-11-30 3:14 GMT+01:00 Suzen, Mehmet <mehmet.suzen at gmail.com>: > My understanding is that there is no inconsistency. `is` does what it > claims, from the documentation: > > ?is?: With two arguments, tests whether ?object? can be treated as > from ?class2?. > > With one argument, returns all the super-classes of this > object's

2017-11-30 13:26 GMT+01:00 Suzen, Mehmet <mehmet.suzen at gmail.com>: > On 30 November 2017 at 11:37, I?aki ?car <i.ucar86 at gmail.com> wrote: >> 2017-11-30 3:14 GMT+01:00 Suzen, Mehmet <mehmet.suzen at gmail.com>: >>> My understanding is that there is no inconsistency. `is` does what it >>> claims, from the documentation: >>> >>>

The is() function begins with the following code: cl <- class(object) if (length(cl) > 1) { if (is.na(match(cl[[1]], names(getClass("oldClass")@subclasses)))) return(class2 %in% cl) As one can see, it uses S3 inheritance if the first element of the class attribute is an "oldClass". In R prior to 2.7, is() would check S4 inheritance if any

2017-11-30 14:13 GMT+01:00 Suzen, Mehmet <mehmet.suzen at gmail.com>: > On 30 November 2017 at 14:04, I?aki ?car <i.ucar86 at gmail.com> wrote: >> >> Am I supposed to read every reference on a man page just to know what >> to expect from a function? >> > > If the reference is from John Chamber, you are supposed to read it. As a joke, it's funny.

Dear Martin, What's the ETA for _R_CLASS_MATRIX_ARRAY_=TRUE to become the new unconditional behavior in R devel? Thanks! H. On 11/21/19 08:57, Martin Maechler wrote: > > TLDR: This is quite technical, still somewhat important: > 1) R 4.0.0 will become a bit more coherent: a matrix is an array > 2) Your package (or one you use) may be affected. > >

Hi there, Is that change in R-devel intentional? library(Matrix) m <- as(matrix(c(0, 1)), "sparseMatrix") isS4(m) # [1] TRUE x <- I(m) # Warning message: # In `class<-`(x, unique.default(c("AsIs", oldClass(x)))) : # Setting class(x) to multiple strings ("AsIs", "dgCMatrix", ...); result will no longer be an S4 object

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 > >

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 Fri, 30 Oct 2020, Pages, Herve wrote: > > On 10/29/20 23:08, Pages, Herve wrote: > ... >> >> I can think of 2 ways to move forward: >> >> 1. Keep I()'s current implementation but suppress the warning. We'll >> make the necessary adjustments to DataFrame() to repair columns supplied >> as I(<S4>) objects. Note that we would still be in

Hi Martin, On 10/26/20 04:52, Martin Maechler wrote: >> >> Hi there, >> Is that change in R-devel intentional? >> >> library(Matrix) >> m <- as(matrix(c(0, 1)), "sparseMatrix") >> >> isS4(m) >> # [1] TRUE >> >> x <- I(m) >> # Warning message: >> # In `class<-`(x,

Thanks Martin for looking into this. H. On 05/13/2015 03:57 AM, Martin Maechler wrote: >>>>>> Herv? Pag?s <hpages at fredhutch.org> >>>>>> on Tue, 12 May 2015 15:18:42 -0700 writes: > >> Hi, > >> The man page for new() suggests that if 'a' is an object with slots >> "slot1" and "slot2" and C is a

2017-11-30 15:54 GMT+01:00 Suzen, Mehmet <mehmet.suzen at gmail.com>: > > > On 30 Nov 2017 14:32, "I?aki ?car" <i.ucar86 at gmail.com> wrote: > >>> >>> Am I supposed to read every reference on a man page just to know what >>> to expect from a function? >>> >> >> If the reference is from John Chamber, you are supposed

Hi, The man page for new() suggests that if 'a' is an object with slots "slot1" and "slot2" and C is a class that extends the class of 'a', then the 2 following calls should be equivalent: new("C", a, ...) new("C", slot1=a at slot1, slot2=a at slot2, ...) This is generally the case but I just ran into a situation where it's not.

>>>>> Joshua Wiley <jwiley.psych at gmail.com> >>>>> on Thu, 8 Oct 2015 12:19:16 +1100 writes: > Hi, I realize this is an old thread, but just wondering > whether a conclusion was ever reached on this issue? I'm > using formula(NULL) but it would be nice if default > initialization worked for formula classes as well. Well,

I agree with Herve, processing collapse happens last so collapse=non-NULL always leads to a single character string being returned, the same as paste(collapse=""). See the altPaste function I posted yesterday. Bill Dunlap TIBCO Software wdunlap tibco.com On Fri, May 22, 2020 at 9:12 AM Herv? Pag?s <hpages at fredhutch.org> wrote: > I think that > >