how to get the numbers of factors in a matrix
On 21 Jan 2014, at 15:58 , Jeff Newmiller <jdnewmil at dcn.davis.ca.us> wrote:
You are mis-using factors. Would you pretend that women do not exist just because your sample happens to include only men? If you really need to ignore those other levels, convert your factor to character and summarize those values.
Actually, just factor(fff) will do. Or droplevels(fff).
Peter Dalgaard, Professor Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com