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st: Fwd: combining two variables
Date: Thu, 02 Feb 2006 16:13:04 -0800
To: [email protected]
From: Daphna Bassok <[email protected]>
Subject: combining two variables
hi all-
i have a data structure question, and i could use some advice.
suppose i have two variables say a_school and b_school. the values of
these two variables are either the same, or one of the two might
be missing. i would like to somehow merge these into a single variable-
say c_school.
if i only had to do this once, it would be quite simple.
gen c_school=b_school
replace c_school=a_school if c_school==.
done.
however, i have to do this repeatedly. as in... i have many of these
pairs. a_size, b_size... a_score, b_score...etc.
i have been trying to figure out a way to do this with the foreach command.
but it doesn't seem to be working out.
does anyone have any suggestions?
any help would be appreciated.
daphna
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