Thanks all for answering me this. All provide me with very useful
information. For future reference, I summarize each method. Matt's
method generates the total count of occurances for each ID, but collapses
the data. Svend sets a record number for each ID. Nick's method is a
shortcut to what I am looking for. Thanks again.
Ying
> Yet another way is
>
> egen totobs = sum(1), by(id)
>
> (what is the observation number? 1 + 1 + 1 + ...)
>
> or -- for slightly more subtle reasons --
>
> egen totobs = count(1), by(id)
>
> Nick
> [email protected]
>
> Svend Juul
>
>> bysort id: generate nobs=_n
>> bysort id: generate totobs=_N
>
> *
> * 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/
>
Ying Wang
Ph.D. Candidate
Department of Public Policy
University of Maryland, Baltimore County
1000 Hilltop Circle,
Baltimore, MD 21228
Tel(O): 410-455-6531
Tel(H): 410-747-6980
Fax: 410-455-1172
Email: [email protected]
*
* 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/
