Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
st: Group identifiers within group
From
<[email protected]>
To
<[email protected]>
Subject
st: Group identifiers within group
Date
Fri, 7 Jun 2013 12:02:30 +0000
Dear all,
I'm trying to create a new variable with a group identifier, but on a 2nd level. For the variable "GroupID" I did the following:
by AnimalID: gen GroupID = _n
Is it possible to do the same but on the 2nd level (based on AnimalID AND Parity), so that I will get the values as shown in the last variable "2nd level"?
I've tried: by TierID: gen var1 = group(par), but this doesn't seem to do the job. Data are sorted by AnimalID and then Parity.
AnimalID Parity GroupID 2nd level?
CH003381451070 3 1 1
CH003381451070 4 1 2
CH003381451070 4 1 2
CH003381462076 2 2 1
CH003381462076 3 2 2
CH003381462076 3 2 2
CH110003099108 10 3 1
CH110003099108 10 3 1
CH110003099108 11 3 2
CH110003099108 11 3 2
CH110003099108 11 3 2
CH110003099108 12 3 3
CH110003099108 12 3 3
CH110003099108 12 3 3
Thanks for your help!
Isabel
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/faqs/resources/statalist-faq/
* http://www.ats.ucla.edu/stat/stata/