On 11/24/05, Raoul C Reulen <[email protected]> wrote:
> Hi,
>
> I have a data file and I want to know whether there are id-numbers that are used twice in the dataset? How can I run a check on this? Thanks.
>
Typing...
. findit duplicates
...would have lead you to the -duplicates- command. See -man
duplicates- for more information. Alternatively you may want to use
Nick Cox's -dups- command which is also listed and is downloadable
from ssc by typing -ssc install dups-
There is also a first principle method given in the FAQ's (which are a
valuable resource) at...
http://www.stata.com/support/faqs/data/dups.html
-findit- and -search- are very useful commands within Stata, check out
the help pages for them.
HTH's
Neil
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
