|
Hello All,
I am in need of building a time "window" column, which would simply be the difference between date2 and date1, in days (and then date3 - date2, etc). I need to do this for all dates at each of hundreds of site id's in my data frame. I was hoping someone would have a bit of code to help out, or at least point me in the right direction. I've looked in the archives to find relevant information, and haven't found much.
thanks!!
Michael W. Slattery
Geologist, Ohio EPA
50 West Town Street, Suite 700
Columbus OH, 43215
michael.slattery@epa.state.oh.us
614-728-1221 (Ph)
614-644-2909 (Fax) |