I could not find any documentation of how dot-dot-dot works when used as an argument in a function call (rather than as a formal argument in a definition). I would appreciate some references to the rules governing situations like:
f1<-function(x,y,...){ print(x) } f2<-function(...){ f1(...) } f2(1,2,3) In the call above how are the three numbers bound to the individual formal arguments x and y of f1 rather than f1 being called with a single pairlist, which is what the documentation says ... is. And while the example above succeeds, why does the following fail, library(lattice) f.barchart <- function(...) { barchart(...) } x <- data.frame(a = c(1,1,2,2), b = c(1,2,3,4), d = c(1,2,2,1)) print(f.barchart(a ~ b, data = x, groups = d)) This gives the error: Error in eval(expr, envir, enclos) : ..3 used in an incorrect context, no ... to look in Jyotirmoy Bhattacharya ______________________________________________ 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.