I am creating a data wall to compare student achievement across 3 time periods Beginning of the Year(H2), Middle of the Year (I2) and End of the Year(J2) and having the difference recorded in K2. I have tried using =MAX(abs(H$2-I$2), abs(I$2-J$2), abs(H$2-J$2)) The issue I am having is when I have only entered Beginning of the Year(H2) and Middle of the Year (I2). I am not getting the difference in K2 but the difference between Middle of the Year (I2) and End of the Year(J2).
I would like a formula if possible to find the diffrence Beginning of the Year(H2) and Middle of the Year (I2) for mid year reports and then when End of the Year(J2) data is entered get the difference between Middle of the Year (I2) and End of the Year(J2) for end of year reports. Is this possible? I hope I have made myself clear.
Thank you