Got it! Thanks to everyone for the help! Vadim > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Gabor > Grothendieck > Sent: Tuesday, November 09, 2004 5:53 PM > To: [EMAIL PROTECTED] > Subject: Re: [Rd] recursive default argument reference > > Vadim Ogranovich <vograno <at> evafunds.com> writes: > > : > : Hi, > : > : It seems that a formal function argument can not default to > an "outer" > : variable of the same name: > : > : > x <- "foo" > : > ff <- function(x=x) x > : > ff() > : Error in ff() : recursive default argument reference > : > > : > : Is this intentional? Why? > : > > Because then one arg could not safely refer to another. Here > x has y as its default value: > > x <- 10 > y <- 7 > f <- function(x = y, y = 3) print(x) > f() # prints 3 > > Note that you could do this: > > x <- "foo" > ff <- function(x.=x) x. > ff() # returns "foo" > ff(x=44) # returns 44 > ff(55) # returns 55 > > For a real example look at merge.data.frame. > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel >
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