Hi All,
I have a data frame with variable names like A_le, A_me, B_le, B_me, C_le,
C_me....
if A_le=1 or A_me=1 then I need to create a new column A_new=1. Same operation
to create columns B_new, C_new...
Does anyone know how to use loop (or other methods) to create new columns? In
SAS, I can use array to get it done. But I don't know how to do it in R.
Thanks,
Keming Yuan
CDC
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