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Re: st: Puzzling error with merge
From
Barbara Romano <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: Puzzling error with merge
Date
Mon, 13 Jan 2014 14:23:12 +0100
Hi David ,
it happened to me last week. After a while I realized that there were some “missing” in my id (key variable). I deleted all the observations with the missing id, than everything worked out.
Barbara
Il giorno 13/gen/2014, alle ore 13:42, David Hoaglin <[email protected]> ha scritto:
> Dear All,
>
> I attempted to merge two datasets, each of which has 247 observations,
> with the following command:
>
> merge 1:1 StudyID using Sheet2
>
> (here "Sheet2" is the last part of the fully qualified name of the
> file, recently imported from Excel).
>
> I received the following error message: "variable StudyID does not
> uniquely identify observations in the master data".
>
> I then tabulated StudyID in the two files. Each output showed no
> frequency other than 1 and a total of 247 observations.
>
> What am I doing wrong?
>
> I am using Stata 13.1.
>
> Thanks for your help.
>
> David Hoaglin
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