Excel：如何跨基于多列的单元格复制公式

Question

I have used a formula =SUM(A3:A16)*0.7 + SUM(B3:B16)*0.25 + SUM(C3:C16)*0.05

when I drag this formula across column I want the next column to be

=SUM(D3:D16)*0.7 + SUM(E3:E16)*0.25 + SUM(F3:F16)*0.05

Instead it is showing: =SUM(B3:B16)*0.7 + SUM(C3:C16)*0.25 + SUM(D3:D16)*0.05

How can I achieve this?

Answer 1

One option would be to combine the SUMPRODUCT and INDEX functions in an array formula:

=SUMPRODUCT(INDEX($A$1:$ZZ$16,N(IF(1,ROW($A$1:$A$16))),N(IF(1,COLUMN($A$1:$C$1)+3*(COLUMN()-1))))*{0.7;0.25;0.05})

Adjust range $A$1:$ZZ$16 as you need.

Array formula after editing is confirmed by pressing ctrl + shift + enter

Line 12 contains your formula.

Answer 2

As the ranges are contiguous, you could also do this:

=SUMPRODUCT(INDEX($A$3:$I$16,1,(COLUMN()-COLUMN($A:$A))*3+1):
INDEX($A$3:$I$16,ROWS($A$3:$I$16),(COLUMN()-COLUMN($A:$A))*3+3)*{0.7,0.25,0.05})