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Re: st: macro list parsing


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: macro list parsing
Date   Tue, 17 Jan 2012 11:37:53 +0000

Alternatively, you can just flush temporary variables before issuing
the -ds- call:

drop __*

Using -ds- is a little roundabout here, although it works fine. See also

SJ-10-3 dm0051  . . . Tip 91: Putting unabbreviated varlists into local macros
        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  N. J. Cox
        Q3/10   SJ 10(3):503--504                                (no commands)
        tip on interactively using unab to expand a varlist and
        place the resulting unabbreviated varlist in a local macro

Nick

On Tue, Jan 17, 2012 at 11:28 AM, Maarten Buis <maartenlbuis@gmail.com> wrote:
> On Tue, Jan 17, 2012 at 12:10 PM, Jakob Petersen <jpeterb@essex.ac.uk> wrote:
>> I am trying order the variables on one file according to the order on
>> another file.
>> This works well on the example datasets, e.g.
>>
>> *********************************************
>> sysuse autornd.dta,clear
>> ds
>> local orderlist `r(varlist)'
>> sysuse auto.dta,clear
>> d
>> order `orderlist',after(turn)
>> d
>> *********************************************
>>
>> But returns an error code when I attempt the same on my own data:
>>
>> variable __000005 not found
>> r(111);
>
> It means that you have a temporary variable in your original file, and
> this variable obviously does not exist in the other files. You can
> exclude temporary variables from the local orderlist by typing
>
> ds __*, not
> local orderlist `r(varlist)'
>
> The trick is that temporary variables have, for as long as they exist,
> names that start with two underscores.
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