How to add up variables in Stata by totaling up values

[Itai Segev]

Hi there, I am trying to add values of my demand variable together but struggling to do so. Attached is a file with what my data looks like. I would like to total out the total demand by year globally, versus separated by country/region. Please let me know how and if this is possible. Lastly, I would also like to convert this annual data into monthly data, please let me know how to do so. Would appreciate any assistance!

[Jared Greathouse]

Please, do read the FAQ to learn how to ask a question. You need to provide an example of your real data with dataex.

[Nick Cox]

#2 plus see

help egen

for its total() function and use e.g. double type as in some variation on

egen double wanted = total(whatever), by(year)

to hold totals precisely.