问题
I currently have this formula which works but it takes a few seconds for excel to catch up, and I was wondering if anyone knew about a more efficient way of handling this. Aside for it taking a few seconds to process when I drag the formula down excel doesn't update the new cells and eventually crashes the entire file.
=SUMPRODUCT(((Paste!$B$2:$B$12000=A2))/COUNTIFS(Paste!$B$2:$B$12000,Paste!$B$2:$B$12000&"",Paste!$C$2:$C$12000,Paste!$C$2:$C$12000&""))
Sample Data:
回答1:
Let's imagine the data layed out in front of us as you present:
1) Formulas Without DA-functionality:
You could apply this method:
In F3:
=SUM(--(FREQUENCY(IF(A$3:A$9=E3,MATCH(B$3:B$9,B$3:B$9,0)),ROW(B$3:B$9)-2)>0))
Enter through CtrlShiftEnter
2) With DA-functionality
You could apply this method:
In F3:
=COUNTA(UNIQUE(FILTER(B3:B9,A3:A9=A2)))
Adapt any of the above to fit your ranges and needs, but do remember array formula may just way heavily on calculation.
3) Pivot Table:
If you want to avoid formulas alltogether, simply select all your data e.g. A2:B9 and follow these steps:
- Click tab
Insertfrom the ribbon and choosePivotTable - Choose where to insert the resulting table and check "Add this data to the Data Model"
- Use "Process" as column, and "Test_ID" as values.
- Go to "Value Field Settings" and summarize values by "Distinct Count"
- Confirm and enjoy the resulting table:
来源：https://stackoverflow.com/questions/62202292/finding-a-more-efficient-way-of-using-sum-product-and-countif