I have the following dataset:
Year Company Product Sales
2017 X A 10
2017 Y A 20
2017 Z B 20
2017 X B 10
2018 X B 20
2018 Y B 30
2018 X A 10
2018 Z A 10
I want to obtain the following summary:
Year Product Sales
2017 A 30
B 30
2018 A 50
B 20
and also the following summary:
Year Company Sales
2017 X 20
Y 20
Z 20
2018 X 50
Y 10
Z 10
Is there any way to do it without using loops?
I know I could do something with the function aggregate, but I don't know how to proceed with it without mixing the data of company, product and year. For example, I get the total sales of product A and B, but it's mixing the sales of both years instead of giving A and B in 2017, and separated in 2018.
Do you have any suggestions?