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Re: st: RE: if "macro" == value {


From   Philip Ryan <philip.ryan@adelaide.edu.au>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: if "macro" == value {
Date   Tue, 03 Feb 2004 17:36:58 +1030

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
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