In a package, i type a function name and got the following message: ... tmp <- .Fortran("master", x = as.double(x), y = as.double(y), sort = as.logical(sort), rw = as.double(rw), npd = as.integer(npd), ntot = as.integer(ntot), nadj = integer(tadj), madj = as.integer(madj), ind = integer(npd), tx = double(npd), ty = double(npd), ilist = integer(npd), eps = as.double(eps), delsgs = double(tdel), ndel = as.integer(ndel), delsum = double(ntdel), dirsgs = double(tdir), ndir = as.integer(ndir), dirsum = double(ntdir), nerror = integer(1)) ... does it mean this function is using something from FORTRAN? Thanks a lot! --------------------------------- [[alternative HTML version deleted]]