Prof Brian Ripley <[EMAIL PROTECTED]> writes: > > This *should* be somewhere in the R Language Definition, although I'm > > not sure it is actually there. Or the blue book, although I suspect > > that S v.3 actually used positional matching (and jumped through > > hoops). > > It did. This is in the FAQ, 3.2.3: > > * In R, the argument of a replacement function which corresponds to the > right hand side must be named `value'. E.g., `f(a) <- b' is evaluated > as `a <- "f<-"(a, value = b)'. S always takes the last argument, > irrespective of its name. > > I seem to recall I discovered the discrepancy in ca 1998.
I seem to recall when we introduced it, and that it was deliberate. What I can't remember is what the occasion was. > R-lang is minimalist about what it calls `assignment functions', most of > the time. `replacement functions' would be correct terminology, right? <- and <<- are the assignment functions. -- O__ ---- Peter Dalgaard Blegdamsvej 3 c/ /'_ --- Dept. of Biostatistics 2200 Cph. N (*) \(*) -- University of Copenhagen Denmark Ph: (+45) 35327918 ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: (+45) 35327907 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
