[datatable-help] Sistematically construction of 2 variables in data table

[Michael Smith]

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
>