st: N visits per patient

["Ziad El-Khatib" <Ziad.El-Khatib@ki.se>]

Hi again
in the same dataset each patient did come more than once, is it
possible to count n of visits per patient using patientID number for
example?

Thank you and best regards
ziad
*
*   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/