. egen total_weeks = total(weeks), by(stratum)
Nick
[email protected]
Shehzad Ali wrote:
I have an individual patient level data with two variables of interest,
one is the number of weeks spent by each patient in the study (values
between 1 and 52) and other being stratum they belong to (values between
1 and 3). I want to generate a new variable (total_weeks) that
summarises the total number of weeks spent by each stratum. So the new
variable will have 3 values only, one for each stratum. I can obviously
use -sum- and -r(sum) to generate separate variables by strata but I was
wondering there must be a quicker way of doing it in one line.
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