Excel 2003 Function Help

[Ryan Hicks]

I need help coming up will a function that will average a range in one column
based on if the hours match. Here is my set up.

-------A-------B
1.....09:21....12
2.....09:46....24
3.....09:57....17
4.....10:04....22

I need to average column B if column A's hour is the same as the hour in a
cell in another worksheet.

 

[Luke M]

This is an array* function
=AVERAGE(IF(HOUR(A2:A10)=HOUR(C3),B2:B10))

*Array functions must be confirmed using Ctrl+Shift+Enter, not just Enter.

 

[Fred Smith]

=SUMPRODUCT(B1:B4,--(HOUR(A1:A4)=Sheet2!A1))/SUMPRODUCT(--(HOUR(A1:A4)=Sheet2!A1))
Adjust the range for the "cell in another worksheet" to suit.

Regards,
Fred