Counting number of weeks to complete a task
Assume:
A2:A10 = Week
B2:B10 = Task
D2:D3 = Painting; Drawing
If there are no empty cells within Week, try this arry formula** :
=COUNT(1/FREQUENCY(IF(Task=D2,Week),Week))
If there might be empty cells within Week, use this version** :
=COUNT(1/FREQUENCY(IF((Task=D2)*(Week<""),Week),Week))
Copy down to D3.
** array formulas need to be entered using the key combination of
CTRL,SHIFT,ENTER (not just ENTER)
--
Biff
Microsoft Excel MVP
wrote in message
...
Hi,
Can anyone help me please.
I have a spreadsheet and I am trying to calculate how many weeks a
task took to complete.
The task does not necessairly have to be completed in consecutive
order.
A brief example:
Week Task
1 Painting
1 Painting
1 Drawing
2 Drawing
2 Drawing
2 Drawing
3 Painting
3 Drawing
3 Drawing
From the table the Painting task was completed in 2 weeks and the
Drawing task was completed in 3 weeks.
I would appreciate your help.
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