Average values in date range

[sarahg]

Hi

I have a list of numerical values (P5200) in O5:O200 is a corresponding
date as to when the values were recorded. How can I calculate an average of
values collected within a specific month.

Thanks

 

[Gaurav]

=AVERAGE(IF(MONTH($O$5:$O$200)=1,$P$5:$P$200))

This is for January. Change 1 to 2 for Feb, 3 for March etc.

It is an array formula and needs CTRL+SHIFT+ENTER not just ENTER.

 

[Mike H]

Try,

=SUMPRODUCT(--(ISNUMBER(P5200)),--(MONTH(P5200)=1),O5:O200)

Mike

 

[Mike H]

Ignore the last answer which wasn't the question you asked

This hopefilly is

=AVERAGE(IF((MONTH(P5200)=1)*ISNUMBER(P5200),(O5:O200),""))

This is an array so commit with CTRL+Shift+Enter Not by simply pressing enter.

Mike

 

[sarahg]

Thanks Guarav,

Works for all months except January - not all of the cells contain data yet.
I have a sumproduct formula calculating something else and know that you add
--(YEAR(RP!$E$5:$E$200)=2009) into the formula.

is something similar required in this, and if so what/where.

 

[Gaurav]

"Works for all months except January"

what do you mean? what does it return?