Rafa:
It should be:
local sum = 0
foreach v of varlist var* {
local sum = `sum' + `v'[1]
}
scalar answer = `sum'
It could also be achieved through -egen rtotal = rowtotal(var*)-
HTH,
Maarten
-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands
visiting adress:
Buitenveldertselaan 3 (Metropolitan), room Z214
+31 20 5986715
http://home.fsw.vu.nl/m.buis/
-----------------------------------------
-----Original Message-----
From: [email protected] [mailto:[email protected]]On Behalf Of R.E. De Hoyos
Sent: dinsdag 30 mei 2006 14:10
To: [email protected]
Subject: st: Adding variables with common prefix
I have a large list of variables with a common prefix, say -var- (var1,
var2, var3...). I want to generate a scalar with the sum of these variable's
first observation. I tried the following loop, but for some reason that I
can't see it is not working, it returns an invalid syntax error message:
local sum = 0
foreach v of var* {
local sum = `sum' + `v'[1]
}
scalar answer = `sum'
What is wrong with this code? Is there an alternative way of adding up
variables with a common prefix?
Rafa
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