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Re: st: How to consecutively add elements to a macro
From
"Ada Ma" <[email protected]>
To
[email protected]
Subject
Re: st: How to consecutively add elements to a macro
Date
Thu, 3 Mar 2011 01:28:21 +0000
One solution is to use global instead and a global can refer to itself - e.g.
global readyvar birthday
global readyvar $readyvar gender
global readyvar $readyvar smoking
ds $readyvar
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-----Original Message-----
From: Thomas Speidel <[email protected]>
Sender: [email protected]
Date: Wed, 02 Mar 2011 14:53:07
To: <[email protected]>
Reply-To: [email protected]: st: How to consecutively add elements to a macro
On Wed, 02 Mar 2011 14:39:36 -0700, Thomas Speidel <[email protected]>
wrote:
> I am working with multiple datasets where I have to modify and
> extract variables to be assembled into a new dataset. To keep track
> of things in my do file, I would like to create a macro, say
> readyvar,
> which stores the variable names as they become ready:
>
> ***********EXAMPLE**************
> local readyvar
> use data1.dta
> <do something>
> save temp1
> local readyvar birthday
>
> use data2.dta
> <do something>
> save temp2
> local readyvar <want to _add_ gender to the macro>
>
> use data3.dta
> <do something>
> save temp3
> local readyvar <want to _add_ smoking to the macro>
>
> <...>
> use temp1
> merge id using temp2 temp3, sort
> keep readyvar
> **********END EXAMPLE************
>
> My question is how to I add elements to an existing macro without
> having to re-type the whole content of the macro each time? Also, if
> I understand correctly, local macros exist only if I run the whole do
> file at once. In other words, if I run 'chunks' of the do files one
> at a time, I would not be able to use the macro that was created in
> the previous 'chunk'. Is this one of those cases where a global
> macro
> is preferrable?
>
> Thank you.
--
Thomas Speidel
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