similar to: trouble with S4 methods for group "Summary"

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

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 everyone and thanks for being patient. I've used "!.foo"() et seq pro tem. Next problem: how to define "Summary" methods for brobs. ?max says 'max' and 'min' are generic functions: methods can be defined for them individually or via the 'Summary' group generic. For this to work properly, the arguments '...' should be

On the help page "DateTimeClasses {base}" it says: "One can add or subtract a number of seconds or a difftime object from a date-time object, but not add two date-time objects." However, > x<-Sys.time(); y<-Sys.time()+3600 > diff<-y-x > x; y; diff [1] "2005-11-23 19:58:20 GMT" [1] "2005-11-23 20:58:20 GMT" Time difference of 1 hours

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

I have observed the following behavior, wondering if it is a bug before I submit a report. I am using the plot function with call: plot(X, Y, col="red", . . . ) where X is an object that inherits from classes 'dates' and 'times' (created with the 'dates' function from package 'chron') and y is a numeric vector. The color red is applied to the

i think these two code snippets exhibit a bug. they are identical but for the inclusion of an initial line in snippet [2] [1] setMethod("Math", signature(x = "numeric"), function(x) "Works") getGeneric("sqrt")(4) [2] getGeneric("sqrt")(4) setMethod("Math", signature(x = "numeric"), function(x) "Works")

I am having some trouble creating a hierarchy of virtual classes (akin to the class structure in the 'Matrix' package). I think they arise from my not understanding the best way to specify virtual subclasses of a virtual class. please see questions below code. setClass("mom") setClass("kid1", representation("mom", "VIRTUAL"))

I maintain the Irregular Time Series (its) package on CRAN. I am currently testing a release. Under 1.8.1 I am able to define a S4 generic 'start' as follows: if(!isGeneric("start")) {setGeneric("start", useAsDefault=start)} Under 1.9.0, Rcmd check generates an error, as 'start' is not recognised. If I use the NAMESPACE directive IMPORT, all is well:

I am having a bit of a struggle deciding when to use attributes with S4 objects. Clearly the 'class' attribute will always be present. But it is not clear to me whether the architects of the methods package intend that other attributes, such as 'names', will still be used when the S4 implementation is complete. I notice that, when you create a formal object from an

I have encountered an issue which I have been unable to resolve, involving an S3 generic (print) being declared S4 generic in a package, and the method being exported. This all works fine - the problem occurs when I try to import the method to another package. Here is the bit that works fine. ------------- #the .r file for package bar

'methods' package feature request / discussion starter: perhaps a call to 'validObject' should occur at part of any slot replacement operation (and the operation not be carried out if it would invalidate the object)? this may prevent the need for prophylactic 'validObject' calls in other user-defined functions. in the example below, the slot assignment occurs

Hi, A lowess method is defined in our package for one of our S4 classes. To explicitely define the generic this is being used if (!isGeneric("lowess")) setGeneric("lowess", useAsDefault = lowess) This works fine for many other methods inherited from various R packages. In this case a warning is issued in R CMD check: * checking R code for possible problems ... NOTE

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

First, if I have an S4 class boo should I define S3 method for printing print.boo(..) or should I define S4 method print(..). I mainly need to define print function only because some user might call it and then I would like to dispatch the call to right function instead. Second, it seems that by defining S4 generic function print, it is possible to break argument hinting on the status bar.

Dear all, I am experiencing some problems with S4 method overloading. I have defined a generic for graphics:plot, using setGeneric("plot", useAsDefault = plot) and with importFrom('graphics', 'plot') and exportMethods('plot') in the NAMESPACE file of pkg A. I then proceed to define a method for signature c('myS4class', 'missing'). This works

Hi I have some problems in defining new generic functions and classes. Just have a look at the following example: require(fPortfolio) setClass("PROBECLASS", representation( type="character" ) ) isGeneric("setType<-") #Returns TRUE #I would like to define a specific function for

Hi I have some problems in defining new generic functions and classes. Just have a look at the following example: require(fPortfolio) setClass("PROBECLASS", representation( type="character" ) ) isGeneric("setType<-") #Returns TRUE #I would like to define a specific function for

Using the '@' operator, I am able to extract a 'names' attribute assigned to a formal object. However, I can not use the replacement form ('@<-') to assign that attribute. > setClass("foo", representation("numeric")) [1] "foo" > (new("foo", 1:4)->a) An object of class ?foo? [1] 1 2 3 4 > names(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