Dear Bill, I didn't realize that "x." would be partially matched by "x" when there was a first (unnamed) argument in the function call -- but I see the error now.
Thanks, John -------------------------------- John Fox Department of Sociology McMaster University Hamilton, Ontario Canada L8S 4M4 905-525-9140x23604 http://socserv.mcmaster.ca/jfox -------------------------------- > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of > [EMAIL PROTECTED] > Sent: Saturday, February 11, 2006 11:07 AM > To: [EMAIL PROTECTED]; [EMAIL PROTECTED] > Cc: r-devel@stat.math.ethz.ch > Subject: Re: [Rd] Arguments of 'transform' > > Hi John, > > Unfortunately I don't think that will fix it because of > partial matching. > > (That would be OK if the argument sequence were reversed to: > > function(..., x.) > > since partial matching does not occur with arguments coming > after ..., but it would break ALL existing code.) > > Bill. > > -----Original Message----- > From: John Fox [mailto:[EMAIL PROTECTED] > Sent: Sunday, 12 February 2006 1:39 AM > To: 'Peter Dalgaard'; Venables, Bill (CMIS, Cleveland) > Cc: r-devel@stat.math.ethz.ch > Subject: RE: [Rd] Arguments of 'transform' > > > Dear Peter and Bill, > > How about changing the current "x argument to something like > "x."? That > should make the problem that Bill points out less likely and still be > backwards compatible with using "x" in the call to transform(). > > Regards, > John > > -------------------------------- > John Fox > Department of Sociology > McMaster University > Hamilton, Ontario > Canada L8S 4M4 > 905-525-9140x23604 > http://socserv.mcmaster.ca/jfox > -------------------------------- > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Peter Dalgaard > > Sent: Saturday, February 11, 2006 4:43 AM > > To: [EMAIL PROTECTED] > > Cc: r-devel@stat.math.ethz.ch; [EMAIL PROTECTED] > > Subject: Re: [Rd] Arguments of 'transform' > > > > <[EMAIL PROTECTED]> writes: > > > > > If you would like a 10 second R puzzle, you might like to > > think about > > > this one: > > > > > > > > > > g <- expand.grid(long = 130:140, lat = -(10:25)) gp <- > > transform(g, > > > > x = long, y = lat) > > > Error in transform(g, x = long, y = lat) : > > > object "long" not found > > > > > > > > > I don't expect this hasn't come up before, but I can't find > > mention of > > > it. I suggest that to minimise this little stumbling block for > > > beginners (and others) we either > > > > > > change the name of the principal argument in transform from 'x' > > > to, say '.x' (or even 'data' as it is in 'with' for example) OR > > > > > > at least put a note in the help file for 'transform' in > > the 'Detalis' > > > section to say > > > > > > *** NOTE: The only tag name unavailable to be used is 'x'. *** > > > > Yes it has come up before (surprisingly rarely though), and > > you're probably right although changing argument names of > > functions should never be taken lightly as there could be > > people using the current ones. > > > > > > > > Just another little seed. > > > > ...which is connected to my grievances with attach() &c the > other day. > > Something about transform() just isn't The Right Way. > > > > -- > > O__ ---- Peter Dalgaard Øster Farimagsgade 5, Entr.B > > c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K > > (*) \(*) -- University of Copenhagen Denmark Ph: > > (+45) 35327918 > > ~~~~~~~~~~ - ([EMAIL PROTECTED]) FAX: > > (+45) 35327907 > > > > ______________________________________________ > > R-devel@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-devel > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
