I advocate not converting to factor in the first place. Delay that until you
won't be wanting specific levels to be accounted for.
--
Sent from my phone. Please excuse my brevity.
On March 1, 2016 9:33:31 AM PST, David L Carlson wrote:
>You need to learn how to send emails in plain text since
You need to learn how to send emails in plain text since html gets mangled on
r-help. See your message below. If I understand your question, it has to do
with what happens to factor levels when you subset your data. Subsetting a
factor does not remove empty factor levels. This is documented on t
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