[R] + and - in RODBC : no longer considered factors
Prof Brian Ripley
ripley at stats.ox.ac.uk
Wed Apr 30 16:34:05 CEST 2008
> So the only workaround to make the large old code base to work is get
> the old type.convert implementation and inject it.
That would be rather hard. Try R-patched (from tomorrow, say) instead.
Note that in well over a month of testing no one else has reported this.
On Wed, 30 Apr 2008, Dieter Menne wrote:
> Prof Brian Ripley <ripley <at> stats.ox.ac.uk> writes:
>> It is nothing to do with RODBC, which follows read.table here:
>> % cat > foo.txt
>>> read.table("foo.txt", header=TRUE)
>> 1 0
>> 2 0
>> and that uses
>>> type.convert(c("+", "-"))
>>  0 0
>>> type.convert(c("+", "a"))
>>  + a
>> Levels: + a
> Thank, Prof. Ripley, this makes sense as an explanation. So even
> a = type.convert(c("+", "-"),as.is=TRUE)
> # num [1:2] 0 0
> does not help, because "num" bites first. Since the docs say
> "convert it it to logical, integer, numeric or complex"
> I would have expected this to be integer, but that's only of academic interest.
> So the only workaround to make the large old code base to work is get the old
> type.convert implementation and inject it.
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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