Hi all, Sorry if this is documented somewhere, but trying to search and google for ways to alter my "..." argument is having me chasing my tail.
Is there someway that I can manipulate the elements in "..."? Specifically I'd like to use certain vars in "...", then remove them from "..." and pass the rest of "..." to another function. Here's a short example: I'm adding more functionality to a generic method by defining how it works on a new class "MyClass": setMethod('existingFunction', 'MyClass', function (object, ...) { vars <- list(...) doSomethingWith(vars$myCustomVar) # now I want to pass the rest of the vars down to another function, # let's say some plotting function, so I'd like to remove # `myCustomVar` from "...", keep the rest of the vars and just # pass the valid "..." elements down through the call chain doSomePlot(somethingSane, ...) }) Currently the `doSomePlot` that's called does fine until it passes the rest of it's vars to the "real" plot method, at which point I'll get a warning like: Warning messages: 1: In plot.window(...) : "myCustomVar" is not a graphical parameter 2: In plot.xy(xy, type, ...) : "myCustomVar" is not a graphical parameter 3: In axis(side = side, at = at, labels = labels, ...) : "myCustomVar" is not a graphical parameter 4: In axis(side = side, at = at, labels = labels, ...) : "myCustomVar" is not a graphical parameter 5: In box(...) : "myCustomVar" is not a graphical parameter 6: In title(...) : "myCustomVar" is not a graphical parameter Depending on what the name of myCustomVar is, this can work even with the warnings, which is passable. It might also bail if myCustomVar happens to share a name with a real plotting var, but has an illegal value for it. Anyway, while there are ways it can work in this case, I'm just wondering if I can remove elements from "..." and side-step these warning/error issues altogether. Since "vars <- list(...)" works to create a list of arguments from "...", I'm guessing there must be a way to take an already existing list variable and turn its name/value pairs into an appropriate "..." object? Thanks for any help, -steve ______________________________________________ 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.