Sorry, I skipped that part.
On 10/25/2014 07:43 PM, Frank S. wrote: > Hi Michael, > > > > The dsum variable results from datep, contained in the original /data > table /I give/, /called dt. Thus, > > dsum is just to keep those dates contained in datep variable which > correspond to 31st december or to the > > last register within each id. > > > > Please, tell me for any further questions. I'm aware that the question > is not easy. > > > > Regards > _______________________________________________ datatable-help mailing list [email protected] https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
