dear all, how could I make the statistic for the following data? for example psn_name, 200001,200002,200003,200004,200005,200006,...,201012
apple, 1,3,4....,9
qwe,3,6,8,....,6
eee,9,6,7,8...,4
....
the psn_name is the name of the company. the variable between 200001 and 201012 is the period from Jan 2000 to Dec 2015. the number is the application each company make in the month. I would like to make the statistic for the number of application companies made during this period. could you please give me some suggestion? thanks in advance. best regards.
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