James
From your output it looks like the exposure() option of
-poisson- _is_ recognising `population' as a variable name, the return
error message even says it does; it's just that pop25m is a string variable
and exposure() won't take a string var as its argument. Presumably, if you
did a:
. describe pop25m
on your data set, you would see pop25m is of type string? The -list-
command is not choosey; it will list pop25m whether it be string or numeric.
Phil
I have a question related to the one answered above. In the following
code, all works well up until line 8 (the poisson command), which returns
exposure(): pop25m: string variable not allowed
1 foreach ICD in i21 {
2 foreach age in 25 35 45 {
3 foreach sex in m f {
4 local deaths = "`ICD'_`age'`sex'"
5 local population = "pop`age'`sex'"
6 macro list
7 list year `ICD'_`age'`sex' pop`age'`sex'
`deaths' `population'
8 poisson `deaths' year, exposure (`population')
9 }
10 }
11 }
In other words, it appears that the list command interprets the local
macro `population' as a varname, but the exposure() part of the poisson
command does not.
Any comments gratefully received.
with thanks,
James.
==========================================
James Harris
National Centre for Epidemiology and Population Health
The Australian National University
CANBERRA ACT 0200
Australia
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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
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http://www.public-health.adelaide.edu.au/
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