Here's one way to create a dummy for each 5-year interval between 1991 and
2015 (adjust limits to suit your problem)
forvalues bot=1991(5)2011 {
local top=`bot'+4
gen years_`bot'_`top' = year >= `bot' & year <= `top' ///
if !missing(year)
}
This sets the dummy years_1991_1995 to 1 for years 1991 to 1995, 0 for other
valid years and . for missing years. To see the command in action without
creating any variables replace the gen years... line by di "gen years..."
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Lynda Zhang
Sent: Thursday, November 10, 2005 4:52 PM
To: [email protected]
Subject: st: create dummy variables for every 5 values
I have a variable Year:
...
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
...
How do I create one dummy variable for each 5-year interval with one
command.
Typically I can get it manually by generating one dummy at a time
gen year1=1 if year>=1991 & year<=1995
...
or using Recode:
gen yr=year
recode yr (1991/1995=1)(1996/2000=2)
tab yr, g(y)
Thanks a lot!
Lynda
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