[R] Thank you for your answers: Re: correction to the previously asked question (about merging factors)

[Svetlana Eden]

Thank you all very much for your attention and patience.
The different answers made a lot of things clear to me.
I've got the answer and learned a lot.

-- 
Svetlana Eden        Biostatistician II            School of Medicine
                     Department of Biostatistics   Vanderbilt University