[R] Panel Data--filling in missing dates in a span only

Hi folks, I have this panel data (below), with observations missing in each of the panels. I want to fill in years for the missing data, but only those years within the span of the existing data. For instance, BC-0002 needs on year, 1995. I do not want any years after the last observation.

Re: [R] Date extract Year

My date column is the excel numeric date format. For instance, in excel, that first date is 11 September 2012. On Mar 8, 2015, at 10:41 AM, Frederic Ntirenganya ntfr...@gmail.com wrote: Hi Steve, Can you please explain to us your date column? thanks. Regards, Fredo. On Mar 8, 2015 7:32