Here are some basic examples:
. clear
. global testglobal "hello world, how are you today"
. display "$testglobal"
hello world, how are you today
. display index("$testglobal","you")
22
. display index("$testglobal","me")
0
. global testglobal2 = subinstr("$testglobal","today","tomorrow",.)
. display "$testglobal2"
hello world, how are you tomorrow
Hope this helps,
ALex
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Jean Eid
Sent: Friday, July 21, 2006 10:22 AM
To: stata
Subject: st: manipulating string variables
I have been trying to do the following with no luck (This is a
simplification rather than exact procedure needed)
Suppose I declare a global variable
global myglobal "hello world, how are you today"
now what I want to do is the following:
a) see whether the string text today exist in $myglobal
b) replace "today" by "tomorrow"
c) instead of "are" I need to change the "a" to "b" let's say.
I know this does not make sense to you right now but I have all these
regressions defined as global variables and need to manipulate them.
Can this be done in Stata?
I have checked strmatch and the likes but am not able to work it. I am
looking for something like grep, sub and the likes in Linux.
If you know how to do this Please provide a workable example.
Thank you for your time
Jean
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