I am sure this is a very basic question:
I have 600,000 categorical variables in a data.frame - each of which is
classified as "0", "1", or "2"
What I would like to do is collapse "1" and "2" and leave "0" by itself,
such that after re-categorizing "0" = "0"; "1" = "1" and "2" = "1" --- in
the end I only want "0" and "1" as categories for each of the variables.
Also, if possible I would rather not create 600,000 new variables, if I can
replace the existing variables with the new values that would be great!
What would be the best way to do this?
Thank you!
--
Thanks,
CC
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