--- Sebastián Daza <[email protected]> wrote:
> > I need to create dummy or indicator variables (0,1) for a period
> > variable (years, age) with the following format:
> <snip>
> > It's important that the name of the variable has the age name. When
> > I use command tab gen, the name of the variable doesn't match with
> > the age name (age 4 = d4).
--- Maarten buis <[email protected]> wrote:
> *----------- begin example ------------------
> sysuse auto, clear
> levelsof mpg
> foreach lev in `r(levels)' {
> gen d`lev' = mpg == `lev'
> assert mpg == `lev' if d`lev' == 1
> }
> *------------- end example ------------------
> (For more on how to use examples I sent to the Statalist, see
> http://home.fsw.vu.nl/m.buis/stata/exampleFAQ.html )
The example below also takes into account that you may have missing
values:
*---------------- begin example -------------------
sysuse auto, clear
levelsof rep78
foreach lev in `r(levels)' {
gen d`lev' = rep78 == `lev' if rep78 < .
assert rep78 == `lev' if d`lev' == 1
assert rep78 != `lev' if d`lev' == 0
assert rep78 >= . if d`lev' == .
}
*---------------- end example ----------------------
(For more on how to use examples I sent to the Statalist, see
http://home.fsw.vu.nl/m.buis/stata/exampleFAQ.html )
-- Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting address:
Buitenveldertselaan 3 (Metropolitan), room N515
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
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