for(i in colnames(dummy)){
levels(dummy[, i]) <- abbreviate(levels(dummy[, i]))
}
HTH,
Thierry
------------------------------------------------------------------------
----
ir. Thierry Onkelinx
Instituut voor natuur- en bosonderzoek
team Biometrie & Kwaliteitszorg
Gaverstraat 4
9500 Geraardsbergen
Belgium
Research Institute for Nature and Forest
team Biometrics & Quality Assurance
Gaverstraat 4
9500 Geraardsbergen
Belgium
tel. + 32 54/436 185
Thierry.Onkelinx at inbo.be
www.inbo.be
To call in the statistician after the experiment is done may be no more
than asking him to perform a post-mortem examination: he may be able to
say what the experiment died of.
~ Sir Ronald Aylmer Fisher
The plural of anecdote is not data.
~ Roger Brinner
The combination of some data and an aching desire for an answer does not
ensure that a reasonable answer can be extracted from a given body of
data.
~ John Tukey
> -----Oorspronkelijk bericht-----
> Van: r-help-bounces at r-project.org
> [mailto:r-help-bounces at r-project.org] Namens Federico Calboli
> Verzonden: dinsdag 13 april 2010 16:18
> Aan: r-help
> Onderwerp: [R] renaming factors *efficiently*
>
> Hi All,
>
> I have a data frame where a couple of columns are factors,
> with long and complex names. Everything works ok --in R, but
> I need to export the data so it can be used on a dumber
> program (one with a three letters name starting with S...). I
> know that those complex factor names are causing problems
> reading the data in from acsv file, so I was thinking of
> renaming the factors. Problem is, I have 173 and 690 factors
> respectively, so I'd appreciate any advice on how to do it
> *efficiently*
>
> TIA,
>
> Federico
>
>
> --
> Federico C. F. Calboli
> Department of Epidemiology and Biostatistics Imperial
> College, St. Mary's Campus Norfolk Place, London W2 1PG
>
> Tel +44 (0)20 75941602 Fax +44 (0)20 75943193
>
> f.calboli [.a.t] imperial.ac.uk
> f.calboli [.a.t] gmail.com
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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