A detail worth emphasising is that the original
code used a scalar only at the very last step.
This cannot of course reclaim any precision lost
by using locals previously. Often this won't
matter in practice, but not always.
Nick
n.j.cox@durham.ac.uk
n j cox
Look again at the help for -foreach-.
foreach v of var var* {
That is, you must specify that var* is a varlist.
I would also use a scalar here.
scalar mysum = 0
foreach v of var var* {
scalar mysum = mysum + `v'[1]
}
R.E. De Hoyos
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?
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