similar to: generics for primitive functions

the following returns an error in an 'exists' call on my machine MyEnv <- new.env() setClass("Numeric", "numeric", where=MyEnv) franklin parlamis > version _ platform powerpc-apple-darwin8.7.0 arch powerpc os darwin8.7.0 system powerpc, darwin8.7.0 status beta major 2 minor 4.0 year

please see the code below. foo2 fails to dispatch correctly, but foo does fine. i have tried 'cacheMetaData(1)' and a number of different variants of 'cacheGenericsMetaData', on the possibility there is a caching issue. but i still can't sort it out. also one general question: does it really matter what's in the body of the function definition in a

the code below has me confused: setClassUnion("index", c("numeric", "character", "logical")) extends("numeric") # i don't see the class union library(Matrix) extends("numeric") # now i see the class union i am aware that the "Matrix" package separately defines the "index" class union. is it the case that

self-sanity check prior to filing a bug report: attempted replacement that generates an error leaves a '*tmp*' variable in the global environment. test <- 1:10 test[2:4] <- expression(e) ls() i've read section 3.4.4 of the "R Language Definition" which discusses the mechanism for replacement, and it is not clear to me whether this was intended, but i suspect

I have classes A and B, where B contains A. In the implementation of the group generic for B I would like to use the corresponding group generic for A. Is there a way to do that? I would also appreciate any comments if what I'm trying to do seems like the wrong approach. Here's a stripped down example: setClass("A",

Hi, I found the following on Windows 2000/NT R Version 1.9.1 (2004-06-21) (also Version 1.9.0): The S4 group "Math" doesn't work as documented; i.e., "log", "log10", "gamma" and "lgamma" are included in the documentation but don't work. See example code below. Moreover, what about 'genericForPrimitive' which is used in

Hello all, I'd like to report a problem related to S4 classes. Platform: Mac G4/400 PCI (PPC-architecture) Mac OS 10.4.8 R 2.4.1 for Mac OS X (CRAN binary, 2006-12-19) w/ R.app 1.18 Last December, Simon Urbanek confirmed that the issue is not platform related, and that it is most likely a bug. He suggested to post my report to "the appropriate mailing list" -- I choose r-devel.

i believe the following is true but would appreciate confirmation that it is intended behavior and will continue: if a default argument is employed in the definition of a generic function, and the generic is called with the argument in question (call it 'ARG') missing, then the method for signature (..., ARG = "missing", ...) will be called by 'standardGeneric'

Hi I used write() the other day to save some results. It seems that write() does not record the full precision of the objects being written: > write(pi,file="~/f",ncolumns=1) > pi.saved <- scan("~/f") Read 1 item > dput(pi) 3.14159265358979 > dput(pi.saved) 3.141593 > pi-pi.saved [1] -3.464102e-07 > This difficulty was particularly difficult to

Hello. This question concerns the Methods package. I have created a new class and am trying to set a method for it for S4 group generic "Summary". I have run into some signature problems. An example: > setClass("track", representation(x="numeric", y="character")) [1] "track" > setGeneric("max", group="Summary")

Newbie trying to install wine in his Mac OSX, getting the old annoying message, home:~/Desktop/wine G3$ /Users/G3/Desktop/wine/tools/wineinstall WINE Installer v0.75 Running configure... configure: creating cache config.cache checking build system type... powerpc-apple-darwin8.7.0 checking host system type... powerpc-apple-darwin8.7.0 checking whether make sets $(MAKE)... no checking for gcc...

Hi, namespaceImportFrom in base/R/namespace.R has the following: fdef <- methods:::getGeneric(genName, impenv) The definition of getGeneric is in methods/R/RMethodUtils.R starts with: getGeneric <- ## return the definition of the function named f as a generic. ## ## If there is no definition, throws an error or returns ## NULL according to the value of

Hi I thought I'd pass one of my package through R CMD check with R-2.4.0 with the following result (it's clean under R-2.3.1): [snip] > > # histogram of the fourth power: > hist(out^4, col="gray") *** caught bus error *** address 0x12, cause 'invalid alignment' Traceback: 1: sort(x, partial = c(half, half + 1)) 2: sum(sort(x, partial = c(half, half +

Hello, ?as.character says that the as.character function is a generic with usage: as.character(x, ...). So, I want to create an S4 object with an as.character method following the above usage, but I get the below error telling me that ... isn't in the generic for as.character. > setClass("tmp", "numeric") > setMethod("as.character", "tmp",

Hello, ?as.character says that the as.character function is a generic with usage: as.character(x, ...). So, I want to create an S4 object with an as.character method following the above usage, but I get the below error telling me that ... isn't in the generic for as.character. > setClass("tmp", "numeric") > setMethod("as.character", "tmp",

I see as below, where getGeneric and getMethod imply a different signature; the signature is mode="any" for both cases in R version 3.2.3 Patched (2016-01-28 r70038)I don't know how to reproduce Jeff's error, though. > library(Matrix) > as.vector function (x, mode = "any") .Internal(as.vector(x, mode)) <bytecode: 0xe79f88> <environment:

> setClass('foo') [1] "foo" > setMethod('is.logical', 'foo', function(x) TRUE) [1] "is.logical" > getGeneric('is.integer') Error in options(x) : evaluation is nested too deeply: infinite recursion? > --please do not edit the information below-- Version: platform = i686-pc-linux-gnu arch = i686 os = linux-gnu system =

There is a version of the methods package committed today that does dispatch in C for these functions. This should considerably speed up programs that define methods for these functions (specifically, having methods should only marginally affect the existing computations for the same function on basic vectors and objects). This is the first of several steps needed. Not quite all primitives are

i often find myself having a list of similarly-classed S4 objects and needing a list containing a particular extracted slot from those objects. so i did the following: > setMethod("slot", signature(object = "list"), + function(object, name) + lapply(object, function(i) slot(i, name))) Creating a new generic function for 'slot' in '.GlobalEnv' [1]

Hi, I am trying to define the as.POSIXct as an S4 method for one of my classes. Trying to define a generic, I am getting an error that it is already differently defined in base. However, if I query for it, there is no definition. Being in base, I also cannot really import it. If I define methods without definig a generic, they will work but with a warning that a new generic will be automatically