Hi, listers.
I have a survival time dataset with customer information, and I want to
create a plot which shows the proportion of the population with a
certain nominal property as it changes over time. Thus I would like to
calculate the number of customers with the property at each time, and
divide it to the number of total customers (or customers with another
interesting property). Since there is not a record at each time t for
every customer, I can't simply calculate it from the records directly.
(- count if prop==1 & time==9 - would miss customers which got the
property at time 8)
Any suggestions as to how I can do this? I played with the idea to
create records for all time intervals, but I can't seem to find an easy
way to duplicate observations either.
Thanks,
Steinar Fossedal
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