drop.levels {gdata} | R Documentation |
Drop unused factor levels for every factor variable in a data frame.
drop.levels(x, reorder = TRUE, ...)
x |
a data frame |
reorder |
should factor levels be reordered using
reorder.factor ? |
... |
additional arguments to reorder.factor |
a data frame
Jim Rogers james_a_rogers@groton.pfizer.com