-----Original Message-----
From: r-devel-bounces at r-project.org
[mailto:r-devel-bounces at r-project.org] On Behalf Of
Bill.Venables at csiro.au
Sent: Saturday, February 11, 2006 11:07 AM
To: jfox at mcmaster.ca; p.dalgaard at biostat.ku.dk
Cc: r-devel at 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:jfox at mcmaster.ca]
Sent: Sunday, 12 February 2006 1:39 AM
To: 'Peter Dalgaard'; Venables, Bill (CMIS, Cleveland)
Cc: r-devel at 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: r-devel-bounces at r-project.org
[mailto:r-devel-bounces at r-project.org] On Behalf Of Peter Dalgaard
Sent: Saturday, February 11, 2006 4:43 AM
To: Bill.Venables at csiro.au
Cc: r-devel at stat.math.ethz.ch; p.dalgaard at biostat.ku.dk
Subject: Re: [Rd] Arguments of 'transform'
<Bill.Venables at csiro.au> writes:
If you would like a 10 second R puzzle, you might like to
g <- expand.grid(long = 130:140, lat = -(10:25)) gp <-
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
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
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
Something about transform() just isn't The Right Way.
--
O__ ---- Peter Dalgaard ?ster Farimagsgade 5, Entr.B
c/ /'_ --- Dept. of Biostatistics PO Box 2099, 1014 Cph. K
(*) \(*) -- University of Copenhagen Denmark Ph:
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~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk) FAX:
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