Hey there!
I have 3 rows of data.
First one is time - let´s say I am interested in a 5 years time frame.
Second and third are variables - X and Y
=> =>=> Data looks like =>=>=>
Period X Y
1 0.9 1.1
2 0.5 1
3 2 1.3
4 4 0.3
5 2.2 2.1
Calculation for the year one is prety simple. Ijust need to summarize values X*Y for all periods (1-5) =>(0,9*1.1)+(0.5*1)+(2*1.3)+(4*0,3)+(2.2*21).
Here comes the tricky part.
In period 2 I want to skip value of X in period 1 and value of Y for period 5. Calculation should looks like => (0,5*1,1)+(2*1)+(4*1,3)+(2,2*0,3)
In period 3 I want to skip values of X for periods 1 and 2 and values of Y for periods 4 and 5. Calculation should looks like => (2*1.1)+(4*1)+(2*1,3)
Thanks and cheers!
