>>>>> "DavidB" == David Brahm <[EMAIL PROTECTED]>
>>>>> on Mon, 30 Jan 2006 18:39:05 +0100 (CET) writes:
DavidB> Wasn't there once a time when tapply(f,f,sum) (with "f" a vector)
DavidB> returned a vector instead of a 1D array? Then colnames(x) would
just
DavidB> give NULL instead of an error. Sorry my memory isn't more precise.
well, it was very good...
R-0.16 had this
R-0.63.3 (March 3, 1999) already didn't anymore, i.e. it
already did return a 1D-array.
So, indeed Karl must have used a *very* old version of R.
Martin Maechler, ETH Zurich
DavidB> -- David Brahm ([EMAIL PROTECTED])=20
DavidB> -----Original Message-----
DavidB> From: [EMAIL PROTECTED]
DavidB> [mailto:[EMAIL PROTECTED] On Behalf Of Prof Brian Ripley
DavidB> Sent: Monday, January 30, 2006 3:45 AM
DavidB> To: [EMAIL PROTECTED]
DavidB> Cc: [EMAIL PROTECTED]; [email protected]
DavidB> Subject: Re: [Rd] colnames(tapply(...)) (PR#8539)
DavidB> On Mon, 30 Jan 2006 [EMAIL PROTECTED] wrote:
>> I would like to bring to your attention the following error message
>> which didn't appear on previous versions (long time ago?)
>>
>> Thanks for all your effort
>>
>> Karl
>>
>> Version 2.2.1 Patched (2006-01-21 r37153)
>>
>> > f <- rep(c(1,2),each=3D5)
>> > x <- tapply(f,f,sum)
>> > colnames(x)
>> Error in dn[[2]] : subscript out of bounds
DavidB> What is inappropriate about this? x is a 1D array, so it does not
have
DavidB> column names (or columns). Indeed, the help page says
DavidB> x: a matrix-like R object, with at least two dimensions for
DavidB> 'colnames'.
DavidB> The exact same message appears in 1.6.2, more than three years old
(and=20
DavidB> the earliest version I still have running). If earlier versions did
not=20
DavidB> have an error message, that was probably a bug.
DavidB> --=20
DavidB> Brian D. Ripley, [EMAIL PROTECTED]
DavidB> Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
DavidB> University of Oxford, Tel: +44 1865 272861 (self)
DavidB> 1 South Parks Road, +44 1865 272866 (PA)
DavidB> Oxford OX1 3TG, UK Fax: +44 1865 272595
DavidB> ______________________________________________
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DavidB> https://stat.ethz.ch/mailman/listinfo/r-devel
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