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Re: st: interaction variables
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: interaction variables
Date
Fri, 15 Apr 2011 17:25:45 +0100
In terms of travelling from where you are now,
forval j = 1/50 {
gen cy`j' = country`j' * year
}
See also -help forvalues- or
SJ-2-2 pr0005 . . . . . . Speaking Stata: How to face lists with fortitude
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
Q2/02 SJ 2(2):202--222 (no commands)
demonstrates the usefulness of for, foreach, forvalues, and
local macros for interactive (non programming) tasks
The last is available at
http://www.stata-journal.com/sjpdf.html?articlenum=pr0005
On Fri, Apr 15, 2011 at 5:20 PM, daniele.curzi <[email protected]> wrote:
> Dear Stata Members, I have to generate interaction variables between a
> country dummy and a time variable!
>
> I have a dataset with 50 countries. So using the tabulate command I get 50
> dummy variables (country1, country2,....country 50). Now I want to multiply
> all these variables for a time variable! In this case I will generate 50 new
> variables!
>
> To do that, I can multiply each country dummy for the time variable.
>
> gen cy1=country1*year
>
> gen cy2=country2*years
>
> ....
>
> gen cy50=country50*years
>
> I was wondering if there exist any command to make this in a faster way!
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