Dear List, I am not really familiar with any other language than R, but Ive heard that in other languages there is something called self referencing.
Heres what Im trying to get an answer for: Suppose there is a function that takes as its input a value of a slot of an S4 object. The function itself is stored in another slot of the SAME S4 object. Is it then possible to have the function automatically recognize the name of the object in which slot it is placed via some sort of self referencing of the S4 object (to avoid having to explicitly state the required function argument for different S4 object instances with different names)? I hope the following code snippets will give you an idea what Im trying to do: obj.for.slot <- data.frame(a=1); obj.for.slot <- data.frame(a=100) save(obj.for.slot, file="C:/obj.1.for.slot.Rdata"); save(obj.for.slot, file="C:/obj.2.for.slot.Rdata") slotfun <- function(obj.name) { file.fqn.char <- paste("file.fqn <- ", obj.name, "@file.fqn", sep="") eval(parse(text=file.fqn.char)) load(file=file.fqn) return(obj.for.slot) } setClass( Class="Testclass", representation=representation( file.fqn="character", data="function" ), prototype=prototype( file.fqn="blabla", data=slotfun ) ) test <- new("Testclass") test.mod <- new("Testclass") t...@file.fqn <- "C:/obj.1.for.slot.Rdata" test....@file.fqn <- "C:/obj.2.for.slot.Rdata" t...@data(obj.name="test") test....@data(obj.name="test.mod") I'm trying to have "slotfun()" be stated in a way that does not require an explicit stating of argument "obj.name"): t...@data() test....@data() Any hints in the right directions greatly appreciated! Regards, Janko Thyson janko.thy...@kuei.de Catholic University of Eichstätt-Ingolstadt Ingolstadt School of Management Statistics and Quantitative Methods Auf der Schanz 49 D-85049 Ingolstadt www.wfi.edu/lsqm Fon: +49 841 937-1923 Fax: +49 841 937-1965 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.