> > Thanks for your help. > > Extra question: tested with a sh block, both of the above do work, that is > with strings or symbols. Which one is supposed to be better (that is, will be > more portable with time), if there is one? >
Both will be maintained. The contribution of a test exercising both options could provide an extra guarantee of perseverance. This is also a good first step towards editing the code. :) > >> Additional testing by someone more familiar with R than myself would be >> greatly appreciated. > > Can't yet be that person, sadly. But time will come that... > > Best regards, > Seb Cheers, -- Eric Schulte http://cs.unm.edu/~eschulte