Remember also that if any of your records have n < 1 (0 is the most usual
culprit) or n is missing, this record will still appear in the -expand-ed
data set and you may need to drop such records to arrive at the number you
expect.
Phil
At 10:28 AM 27/04/2004 +0100, you wrote:
Good morning
i have a data set with four variables, year ca age and n, where n is the
number of each combination or the other three
e.g.
yeat ca age n
1995 1 13 309
1995 1 14 420
1995 2 13 363
the years can range from 1995-2002, ca from 1-6 and age from 13-19
what i would like to do is to expand the data set that i have one line for
each case so for the first line above i would have 309 duplicated lines
i have try using expand but it does not give me the data set i want (i
know the total n when expanded)
on another point , is stata8 case sensitive , i tried the following
tab ca - this would not work
but
tab CA would - if stata 8 is case sensitive is it possible to turn it off
regards
ann
------------
Ann Fitzmaurice
Medical Statistician
Dugald Baird Centre for Research on Women's Health
Aberdeen Maternity Hospital
University of Aberdeen
Aberdeen AB25 2ZL
Uk
[email protected]
Tel . 01224 553876
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Philip Ryan
Associate Professor,
Department of Public Health
Associate Dean (Information Technology)
Faculty of Health Sciences
University of Adelaide 5005
South Australia
tel 61 8 8303 3570
fax 61 8 8223 4075
http://www.public-health.adelaide.edu.au/
CRICOS Provider Number 00123M
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