Or just
gen grp = sum(flag == "01")
Nick
[email protected]
Doug Owens replied to MITRA PINAKI
> I have a data set where I need to group observations. The
> identifying flag
> is two character string which can be either "01" or "02". Each "01"
> observation is followed by "02", so the flag for the first
> obs is "01" and
> the very next one's is "02". But these are always not in
> pair; order can be
> "01" and "02"; "01", "02", "02"; "01", "02", "02, "02" and
> so on. All the
> "02" obs. followed by "01" belong to one group. Is there
> any way I can
> generate an identifier that indicates these groups?
>
Assuming you want to create grp like:
Flag grp
01 1
02 1
01 2
02 2
02 2
01 3
02 3
02 3
02 3
Then you can just
gen grp = flag=="01"
replace grp = sum(grp)
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