Re: [R] group factor levels

As always the question seems silly after you've learned the answer! Thanks a lot, baptiste On 3 February 2010 15:06, Petr PIKAL wrote: > # order levels > f.t<-factor(f, levels=disorder) > # change levels > levels(f.t) <- new.lev > all.equal(f.t,f2) > [1] TRUE > > > Regards > Petr > > >> >> Bes

[R] group factor levels

Dear list, I cannot find an elegant solution to this problem. I have a factor f containing several levels (5) and I wish to create a new factor of the same length with fewer levels (2). This new factor should therefore group together some levels of the original data. Ideally this grouping would be