similar to: Inheritance for S3 classes

Displaying 20 results from an estimated 30000 matches similar to: "Inheritance for S3 classes"

2017 Aug 08
0
Inheritance for S3 classes
You might find http://adv-r.hadley.nz/s3.html to be helpful (in particular, http://adv-r.hadley.nz/s3.html#constructors-1, gives my advice about subclass constructors) Hadley On Mon, Aug 7, 2017 at 7:06 PM, Kym Nitschke <kym.nitschke at icloud.com> wrote: > Hi R Users, > > I am relatively new to programming in R ? so I apologise if my questions appear ?dumb?. > > I am using
2017 Aug 08
0
Inheritance for S3 classes
The S3 class model isn't really a class model. It's more a way of overloading functions. So it's rather simple, and there's less there than you might be expecting. I always thought the "Object Oriented Programming" chapter of the R language definition manual that ships with R was a very good treatment. Have you tried there? If not, please do so. But surely you know how
2019 Mar 27
2
Discrepancy between is.list() and is(x, "list")
> the prison made by ancient design choices That prison of ancient design choices isn't so bad. I have no further comments on object oriented semantics. However, I'm planning to follow the following design pattern. If I set the class of an object, I will append the new class to the existing class. #good class (object) = c ("something", class (object) ) #bad class (object)
2013 Jun 19
2
str and s3 classes
Hi all, Because str uses the generic version of length and names, it's currently very easy to create objects that break str: a <- structure(list(1:5), class = "a") length.a <- function(x) 2L str(a) b <- structure(list(1:5), class = "b") names.b <- function(x) character() str(b) These are obvious toy examples, but it is a real problem if you want to create
2006 Mar 07
3
Making an S3 object act like a data.frame
"[.ggobiDataset" <- function(x, ..., drop=FALSE) { x <- as.data.frame(x) NextMethod("[", x) } "[[.ggobiDataset" <- function(x, ..., drop=FALSE) { x <- as.data.frame(x) NextMethod("[[", x) } "$.ggobiDataset" <- function(x, ..., drop=FALSE) { x <- as.data.frame(x) NextMethod("$", x) } > class(x) [1]
2018 Dec 09
2
Clases S3, S4...
Y para completar, también existen las reference class o las más modernas R6. https://adv-r.hadley.nz/r6.html Que se parecen más a los lenguajes más orientados a objetos, con sus herencias y demás historias. dom., 9 dic. 2018 17:23, Carlos J. Gil Bellosta <cgb en datanalytics.com> escribió: > Hola, ¿qué tal? > > S3 es un sistema de clases bastante primitivo. Está pensado
2018 Aug 09
2
vctrs: a type system for the tidyverse
On Thu, Aug 9, 2018 at 4:26 PM jan Vitek <vitekj at icloud.com> wrote: > > > I'm now confident that I > > can avoid using "type" by itself, and instead always use it in a > > compound phrase (like type system) to avoid confusion. That leaves the > > `.type` argument to many vctrs functions. I'm considering change it to > > .prototype,
2018 Aug 09
2
vctrs: a type system for the tidyverse
> > As Gabe mentioned (and you've explained about) the term "type" > > is really confusing here. As you know, the R internals are all > > about SEXPs, TYPEOF(), etc, and that's what the R level > > typeof(.) also returns. As you want to use something slightly > > different, it should be different naming, ideally something not > > existing yet
2009 Jun 18
1
Learning S3
Hi all, Do you know of any good resources for learning how S3 works? I've some how become familiar with it by reading many small pieces, but now that I'm teaching it to students I'm wondering if there are any good resources that describe it completely, especially in a reader-friendly way. So far I've found: *
2012 Dec 12
1
Lost in S4 and S3 classes
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",
2019 Mar 26
4
Discrepancy between is.list() and is(x, "list")
> I have noticed a discrepancy between is.list() and is(x, ?list?) There's a similar problem with inherits(). On R 3.5.3: > f = function () 1 > class (f) = "f" > is.function (f) [1] TRUE > inherits (f, "function") [1] FALSE I didn't check what happens with: > class (f) = c ("f", "function") However, they should have the same
2005 May 23
2
Documentation of S3 and S4 classes, inheritance
I'd like to have a class A that computes a likelihood, and a subclass B that computes the same likelihood by sometimes throws in an additional term (B includes measurement error). So B's likelihood needs to call A's, and then (sometimes) multiply by an additional term. It sounds as if, in the S3 scheme, NextMethod is supposed to do this: like.A <- function(stuff) compute value
2015 Jul 27
2
Método S3 paquete
Hola Carlos, Muchas gracias por el enlace, me ha sido de gran ayuda. Ya he entendido cómo funciona el sistema S3. Un saludo, Guillermo > Hola, ¿qué tal? > > Sigue http://www.datanalytics.com/2011/08/04/desarrollo-de-paquetes-con-r-iv-funciones-genericas/ > a rajatabla y lo tendrás. > > Un saludo, > > Carlos J. Gil Bellosta > http://www.datanalytics.com > >
2005 May 23
1
SV: Documentation of S3 and S4 classes, inheritance
I am sure that I do not have the answer to your question - but I would like to add to your views regarding the S4-issue. I've been involved in the gRbase package for graphical modelling in R. The first version was implemented in S4 but now we have made a roll-back to using S3 methods. While, I can see that S3 is not really comprehensive enough for 'proper' object oriented
2010 Sep 01
1
S3 method for package listed in suggest/enhance
Hi all, The profr package provides a method for displaying its output with ggplot: ggplot.print. You don't need this ggplot2 to use profr, so ggplot2 is listed under enhances in the DESCRIPTION file. If I have just S3method(ggplot, profr) in my NAMESPACE, then I get: ** testing if installed package can be loaded Error : object 'ggplot' not found whilst loading namespace
2016 Apr 19
4
S3 dispatch for S4 subclasses only works if variable "extends" is accessible from global environment
Does it make sense to be able to load an S4 object without the methods package being attached? I'm not sure implementation-wise how easy this would be, but it seems like any time there is an S4 object around, the methods package should be available to deal with it. ~G On Tue, Apr 19, 2016 at 7:34 AM, Michael Lawrence <lawrence.michael at gene.com > wrote: > Right,
2018 Dec 09
3
Clases S3, S4...
Buenas Desde hace ya bastante tiempo veo viendo que hay diferentes tipos de clases en R, las mas viejas, S3, y luego algunas mas modernas como S4,... ?Que diferencias existen entre estas clases? Alguna buena referencia la respecto, que sea entendible por un profano de la informatica?= Gracias Jes?s [[alternative HTML version deleted]]
2005 Jan 14
1
S3/S4 classes performance comparison
Hi R-devel, If you did read my survey on Rhelp about reporting, you may have seen that I am implementing a way to handle outputs for R (mainly target output destinations: xHTML and TeX). In fact: I does have something that works for basic objects, entirely done with S4 classes, with the results visible at: http://www.stat.ucl.ac.be/ROMA/sample.htm http://www.stat.ucl.ac.be/ROMA/sample.pdf To
2020 Jan 21
2
class(<matrix>) |--> c("matrix", "arrary") -- and S3 dispatch
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. > >
2013 Aug 24
2
Correct NAMESPACE approach when writing an S3 method for a generic in another package
Dear List, In one of my packages I have an S3 method for the plot3d generic function from package rgl. I am trying to streamline my Depends entries but don't know how to have plot3d(foo) in the examples section for the plot3d method in my package, without rgl being in Depends. Note that I importFrom(rgl, plotd3d) and register my S3 method via S3Method() in the NAMESPACE. If rgl is not in