[EpiData-list] Data missing after merge - any ideas?

epidata-list at lists.umanitoba.ca epidata-list at lists.umanitoba.ca
Fri Apr 9 13:15:55 CDT 2010

Dear Susie:

"Same fields" sounds to me rather like an "append" than a "merge" task, 
thus I would expect 9500 records, each with a different ID.  I wonder 
why a record should have the same fields (file A) as another record 
(file B) but have the same ID in file A and file B?  It would mean that 
the same individual can have two different values for the same field and 
that kind of doesn't tally.



On 20:59, epidata-list at lists.umanitoba.ca wrote:
> Hello everyone,
> I have two files - one fairly large (9000 records, 51 fields) and a second
> one with 500 records, and the same 51 fields.  I can read and manipulate
> both files in Epidata Analysis but when I try to merge them using the common
> field of ID number, the second one has all missing variables, except the
> common field of ID number.  I can't think what I'm doing wrong.  Any
> guidance would be very helpful!
> Thanks,
> Susie Foster

Hans L Rieder, MD, MPH
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