"Gabor Grothendieck" <[EMAIL PROTECTED]> wrote:

> Is this ok or is it what you are trying to avoid:

> factor(unlist(lapply(cutYield, as.character)))

Thank you Gabor.  The problem with that is what if some levels do not
appear in any member of cutYield?  In that case, the factor created above
would contain fewer levels than those present in every member of cutYield.

Cheers,

-- 
Sebastian P. Luque

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