Average from 2 unsorted lists


K

KevinE

Hello all,

I would like a formula that would find an average from two unsorte
lists.
One containing 12 months data and the other 3 months.


[a1]John [b1]26 [C1]Jack [D1]14
[a2]Fred [b2]21 [C2]John [D2]11
[a3]Jack [b3]32 [C3]Pete [D3]15
[a4]Pete [b4]24 [C4]Fred [D4]9

The averages should work out as:
John 18.5
Fred 15.0
Jack 23.0
Pete 19.5

many thanks for any help
 
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G

Guest

If each name appears in each list only once

=(SUMPRODUCT(--(A1:A4="John")*B1:B4)+SUMPRODUCT(--(C1:C4="John")*D1:D4))/2

If John can appear more than once per list

=(SUMPRODUCT(--(A1:A4="John")*B1:B4)+SUMPRODUCT(--(C1:C4="John")*D1:D4))/=(SUMPRODUCT(--(A1:A4="John"))+SUMPRODUCT(--(C1:C4="John"))
 
B

Biff

Hi!

Assume you have the unique list of names in A10:A13

In B10 enter this formula using the key combo of CTRL,SHIFT,ENTER:

=AVERAGE(IF(A$1:A$4=A10,B$1:B$4,IF(C$1:C$4=A10,D$1:D$4)))

Copy down to B13

Biff
 
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G

Guest

KevinE -

The first formula I gave you works IF AND ONLY IF each name appears twice.
Unless that is an ironclad guarantee, use the second formula



Duke Carey said:
If each name appears in each list only once

=(SUMPRODUCT(--(A1:A4="John")*B1:B4)+SUMPRODUCT(--(C1:C4="John")*D1:D4))/2

If John can appear more than once per list

=(SUMPRODUCT(--(A1:A4="John")*B1:B4)+SUMPRODUCT(--(C1:C4="John")*D1:D4))/=(SUMPRODUCT(--(A1:A4="John"))+SUMPRODUCT(--(C1:C4="John"))


KevinE said:
Hello all,

I would like a formula that would find an average from two unsorted
lists.
One containing 12 months data and the other 3 months.


[a1]John [b1]26 [C1]Jack [D1]14
[a2]Fred [b2]21 [C2]John [D2]11
[a3]Jack [b3]32 [C3]Pete [D3]15
[a4]Pete [b4]24 [C4]Fred [D4]9

The averages should work out as:
John 18.5
Fred 15.0
Jack 23.0
Pete 19.5

many thanks for any help.
 

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