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2007 Mar 30
1
Using split() several times in a row?
Hi, fellow R users.
I have a question about sapply and split combination.
I have a big dataframe (40000 observations, 21 variables). First
variable (factor) is "date" and it is in format "8.29.97", that is, I
have monthly data. Second variable (also factor) has levels 1 to 6
(fractiles 1 to 5 and missing value with code 6). The other 19
variables are numeric.
For each month I