Hi, Dear colisters:
I have a question regarding manipulating the data below. I would like to
calculate the integral of A1, A2 and A3 by summing up from t=0 to t=t.
In the end, I'd like to have three additional columns, A11, A22, A33
corresponding to A1, A2, and A3. A11 should be the summation of A1 from
t=0 to t=t.
I.e. At T=4, A11 should calculate 0+0.01+0.016+0.023+0.03, and A33
should be 0+0.5+0.53+0.48+0.4.
I hope my attempt and explanation is clear. My first thought is to do a
loop function, but I couldn't quite figure out. I appreciate your help!
Thank you.
market
prod
Period (t)
A1
A2
A3
a
b
0
0
0
0
a
b
1
0.01
0.01
0.5
a
b
2
0.016
0.02
0.53
a
b
3
0.023
0.03
0.48
a
b
4
0.03
0.04
0.4
a
b
5
0.039
0.04
0.45
a
b
6
0.044
0.05
0.48
Joanne
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