Thanks. Hallo Raul Miller, je schreef op 28-01-10 19:31: > M. does not work here because the right > argument for sigmat is a list of integers and > not an integer. > > Also, J does not implicitly short circuit calculations > in except in the rare context of special code. > (M. can be one of these rare examples.) > > FYI, > > -- Met vriendelijke groet, =@@i