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Re: st: Re: Comparing datasets


From   "Eva Poen" <eva.poen@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Re: Comparing datasets
Date   Mon, 15 Sep 2008 22:18:43 +0100

If you use -cf- you have to use it in both directions, to be on the
safe side. However, -cf- compares all values as well, which will
clutter the output considerably if these are actually two different
datasets with the same variable names.

Here is a way to avoid this problem. The example uses the auto data.

****
sysuse auto, clear
drop foreign
save myauto1
sysuse auto, clear
drop price head
save myauto2

qui ds
local second `r(varlist)'

use myauto1, clear
qui ds
local first `r(varlist)'

foreach x of local first {
 if strpos("`second'","`x'") == 0 {
   di in yellow "`x' is not present in the second file."
 }
}

foreach x of local second {
 if strpos("`first'","`x'") == 0 {
   di in yello "`x' is not present in the first file."
 }
}

erase myauto1.dta
erase myauto2.dta
************************

Eva

2008/9/15 Martin Weiss <mw.stlist@googlemail.com>:
> -h cf-
>
> Martin Weiss
> _______________________
> ----- Original Message ----- From: "Raphael Fraser"
> <raphael.fraser@gmail.com>
> To: <statalist@hsphsun2.harvard.edu>
> Sent: Monday, September 15, 2008 10:42 PM
> Subject: st: Comparing datasets
>
>
>> I have 300 variables in one dataset, 298 in another dataset. Both
>> datasets should have the same variable names. How can I identify which
>> variables do not match up?
>>
>> Raphael
>> *
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>> *   http://www.ats.ucla.edu/stat/stata/
>
> *
> *   For searches and help try:
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>
*
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