[R] factor creation
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Sep 12 10:13:58 CEST 2003
On Fri, 12 Sep 2003 anne.piotet at urbanet.ch wrote:
> Another newbie question....
> I want to create a factor (say cT)from a numerical variable (sy temp) by
> regrouping the values in classes (say cT <390, [390,400[,[400,409[...>=550)
> Is there a simple way of doing that using the factor function?
No, but see ?cut.
> AND I do not find how to manipulate strings (I want to concatenete characters
> strings ("abkdas","chjw") into something like ("abkdas;chjw")what operators are
> available for strings manipulation and where do I find help??
See ?paste. This is in `An Introduction to R', and all good books on S/R
will give you more details.
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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