The following could probably behave better:
> test$TESTFAC <- NULL
> test
NULL data frame with 8 rows
> summary(test)
Error in z[[i]] : subscript out of bounds
In addition: Warning message:
no finite arguments to max; returning -Inf
(rw2001 on win XP)
Kjetil
--
Kjetil Halvorsen.
Peace is the most effective weapon of mass construction.
-- Mahdi Elmandjra