<>
Anna could also create the identifiers as
*************
clear*
//get the universe of possible 5 digits
set obs 90001
gen newpersonid=_n+9999
//get 11.000 w/o replacement
sample 11000, cou
//see what happened
desc
isid newpersonid
*************
save this to a -tempfile-, load her original dataset and -merge- by
observation.
HTH
Martin
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Anna Reimondos
Gesendet: Donnerstag, 12. November 2009 03:38
An: [email protected]
Betreff: st: How to create a random number identifier number
Hello,
I am experiencing problems creating a unique set of number for my dataset.
I have a dataset with around 11,000 subjects or persons, and each one
of these subjects has a unique identifier that is 5 digits long
(personid).
I need to create a concordance file which list the original 5 digit
"personid" and matches this to another new randomly created identifier
for each person. This new identifier (new_personid) also has to be 5
digits long.
Example:
personid new_personid
10526 35624
18594 21893
54632 12489
I have tried playing around with the gen x = uniform() function but
to no avail. I am unable to create exactly 11,000 unique numbers with
5 digits.
I also tried just using the egen x=se() command, but then the ids are
sequential and not random and I am afraid then perhaps someone could
figure out how to match the personid and the newperson id....
Any help would be much appreciated,
Thanks
Anna
(Using STATA 10.1, Windows Vista)
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