Re: st: RE: new local macro from results of loop

[Ronnie Babigumira <rb.glists@gmail.com>]

Thanks Nick and Maarten

Both of your suggestions work (they look the same save for the "" in Maartens solution). That said, I have missed the 
obvious so I will ask that you help me with the logic

My part of the loop goes through each element and does my stuff

foreach v of local lvstk {
	--my stuff--
	

How exactly does your part work
 	local lvstknos "`lvstknos' `v'nbeg `v'nend"
 	local new `new' `v'nbeg `v'nend

It appears that you are each amending a new local (part of my confusion is that this new local has not been initialised 
before). My other problem is that I don't see the part that instructs Stata to incrementally build the new local

Again, your solutions both work . I just want to understand the logic

Many thanks

Ronnie

Maarten Buis wrote:

> foreach v of local lvstk {
>     egen `v'nbeg = sum(liv_begnum) if `v', by(houscode qtr)
>     egen `v'nend = sum(liv_endnum) if `v', by(houscode qtr)
>     local lvstknos "`lvstknos' `v'nbeg `v'nend"
> }
>
> Hope this helps,
> Maarten
>
> NB notice the absence of the equal sign in the local 
> statement, this will protect you against strings that
> are too long.
>
> -----------------------------------------
> Maarten L. Buis
> Department of Social Research Methodology 
> Vrije Universiteit Amsterdam 
> Boelelaan 1081 
> 1081 HV Amsterdam 
> The Netherlands
>
> visiting address:
> Buitenveldertselaan 3 (Metropolitan), room Z434 
> +31 20 5986715
>
> http://home.fsw.vu.nl/m.buis/
> -----------------------------------------
>
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Ronnie Babigumira
> Sent: woensdag 30 mei 2007 16:35
> To: statalist@hsphsun2.harvard.edu
> Subject: st: new local macro from results of loop
>
> Dear list
>
> I define a local macro lvstk below which contains variables I would like to process further. For example
>
> local lvstk "cattle largeanims calves smallrums smallanims"
>
> foreach v of local lvstk {
>         egen `v'nbeg = sum(liv_begnum) if `v', by(houscode qtr)
>         egen `v'nend = sum(liv_endnum) if `v', by(houscode qtr)
> }
>
> how do I automatically put the new variables being generated into a new macro
>
> say
>
> local lvstknos "cattlenbeg cattlenend ....and-all-the-other-stuff-coming-out-of-the-foreach-loop"
>
> Ronnie
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