Hello,
I am struggling with converting panel data from one form to another. The current
data structure does not seem to lend itself to a simple reshape. I am also
struggling with the first wave of the winter colds and flus, which may be why
the solution is eluding me. I'd greatly appreciate ideas anyone has on the
following problem.
Presume I have data in the following form:
id start end true
a 1 4 1
a 5 6 0
a 7 10 1
a 11 13 0
a 14 16 1
b 1 3 1
b 4 7 0
b 8 10 1
I would like to put it in this form:
id period true
a 1 1
a 2 1
a 3 1
a 4 1
a 5 0
a 6 0
a 7 1
a 8 1
a 9 1
a 10 1
a 11 0
a 12 0
a 13 0
a 14 1
a 15 1
a 16 1
b 1 1
b 2 1
b 3 1
b 4 0
b 5 0
...and so on. This isn't quite the same as running reshape on the data, because
the data are not, technically, in a wide format.
I suspect I am not the first person to encounter this issue: I have data that
reports spans of time when some condition holds, and I want to convert the data
into spells. Is there a canned command, or a canny combination of reshape and
some other commands, that will do this?
Best Regards,
John-Paul Ferguson
MIT
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