[R] Question about setReplaceMethod Hi    I have the code like I show below. The problem here is that I have a setReplacementMethod to set the value of my class slot. However, this function doesn't work when I call it within another function definition (declared by setMethod) of the same class. I do not understand this behavior that much. I'm wondering how to make this work? Any help would be really appreciated. Thank you.   setClass("foo",  representation(x="data.frame", y="character")) setGeneric("setX<-", function(this, value), standardGeneric("setX<-")) setReplaceMethod("setX", "foo", function(this,value) { this@x <- value }) setGeneric("generateFrame", function(this), standardGeneric("generateFrame")) setReplaceMethod("generateFrame", "foo", function(this) { frame <- read.csv(file="myfile.csv", header=T) # read some input file this@x <- frame # this doesn't replace the value for me setX(this) <- frame # this doesn't replace the value for me frame # instead I have to return the frame object }) foo <- function(x,y) { objFoo <- new("foo", x=data.frame(NULL), y="") frame <- generateFrame(objFoo) # after this point, nothing got assigned to objFoo@x setX(objFoo) <- frame # this will work (why do I have to duplicate this??)  } - adschai 	[[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.