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st: R: Creating a variable with the highest value from two other variables


From   "Carlo Lazzaro" <carlo.lazzaro@tin.it>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: R: Creating a variable with the highest value from two other variables
Date   Sat, 13 Oct 2007 09:45:17 +0200

Crister wrote:
Hi,

I have two income measures, X and Y. I want to create a variable, Z, that is

equal to X for those obs where X>=Y and equal to Y for those obs where Y>X. 
Like this:

id    X    Y       Z
1    12    11    12
2    10    10    10
3    10    12    12

Is there a simple way?

BR,

Christer 

Dear Christer,

yes there is.

Please take a look at what follows beneath:

------------------begin example----------------------
input id X Y 
id          X          Y
1. 1    12    11
2. 2    10    10
3. 3    10    12
4. end
gen Z=X if X>=Y
replace Z=Y if Y>X
------------------end example----------------------
Hope this helps and Kind Regards,

Carlo
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