Dear Community,
I have a problem with construction two new columns which are dependent to each other. A small example below:
time Column A, Column B, Column C
1 100 (given as variable)) 3 sum(Column A, Column B)
2 Column C (of time 1) 4 sum(Column A, Column B)
3 Column C (of time 2) 5 sum(Column A, Column B)
4 Column C (of time 3) 6 sum(Column A, Column B)
When I make Column A first, I get message "Column C doesn't exist".
When I make Column C first, I get message "Column A doesn't exist".
It happens because these two columns dependent.
What should I write in script to have them together?
Thank you in advance!
