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st: set obs by level (of multiple variables)?
From
Tim Evans <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: set obs by level (of multiple variables)?
Date
Thu, 17 Jan 2013 15:08:56 +0000
Hi all,
I'm trying to insert extra observations in my dataset - I've calculated survival and wish to graph the results but the data start from less than 100%, but I'd like the graph to graph from time 0 and thus 100%. My dataset is split by gender and stage so I need something that inserts an observation for say males & stage 1, males stage 2, females stage 1 and females stage 2.
Unfortunately, while this will provide me with an observation
set obs `=_N+1' it does not support this:
bysort stage sex: set obs `=_N+1'
Does anyone have an idea how I might do this in Stata 11.2?
Best wishes
Tim
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