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Re: st: local macro
From
Mitch Abdon <[email protected]>
To
[email protected]
Subject
Re: st: local macro
Date
Wed, 26 Feb 2014 12:18:04 +0800
hi, rochelle.
more appropriately, it is 'initialized' to nothing.
in the first instance, `i' is nothing, not even zero. that's is why you get y not y0.
in the next iteration, i is defined as i = `i' + 1 which is 1, thus the y1.. and so on.
On Feb 26, 2014, at 11:53 AM, R Zhang <[email protected]> wrote:
> Dear all,
>
> this might be a rudimentary question,
>
> I saw the following code on UCLA stata cite
>
> http://www.ats.ucla.edu/stat/stata/faq/doublewide.htm
>
> *********************************
> input d1t1 d1t2 d1t3 d2t1 d2t2 d2t3 d3t1 d3t2 d3t3
> 4 5 6 5 6 5 6 7 8
> 3 4 5 4 5 4 3 4 5
> end
>
>
>
> generate id = _n
> foreach v of varlist d1t1 d1t2 d1t3 d2t1 d2t2 d2t3 d3t1 d3t2 d3t3 {
> rename `v' y`i'
> local i = `i' + 1
> }
> *********************************
>
> my question is: is the i initialized to 0 (default), I ask because
> the output is
>
> y y1 y2 y3 y4 y5 y6 y7 y8 id
>
> 1. 4 5 6 5 6 5 6 7 8 1
> 2. 3 4 5 4 5 4 3 4 5 2
>
>
> thanks !
>
> Rochelle
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