formula to scan a list and get last 5 values? please help

[rca]

Hello!

I have a dynamic named range (called "myRange") that is currently in cells C3:C45. Each day, this range 'grows' by 1 row. So, tomorrow, for instance, the range will be from C3:C46. I am trying to write a formula that would SUM up the last 5 values in this range. So, simplistically, the formula would just be =SUM(C41:C45). BUT, how do I write a SUM formula that also grows with the range. So, a few weeks from now, the formula would maybe read =SUM(C92:C96).

Is there a way to make the formula 'move' automatically as the range grows with time?

Thanks a lot!
Rachel

 

[Norie]

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[rca]

Hi Norie,

I don't know how to do that. The current formula is:

=OFFSET(Historical!$D$3,0,0,COUNT(Historical!$D:$D),1)

Thanks for your help!

 

[Norie]

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[Aladin Akyurek]

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Hi Norie,

I don't know how to do that. The current formula is:

=OFFSET(Historical!$D$3,0,0,COUNT(Historical!$D:$D),1)

Thanks for your help!

Are you on Excel 2003?

 

[rca]

Hello Aladin,

Yes, I am on Excel 2003.

Rachel

 

[rca]

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Hi Norie,

That formula does not seem to work for me. It returns the last number in the range. I don't think it sums the last 5 numbers in the range.

Any other ideas?

Thanks,
Rachel

 

[PA HS Teacher]

How about something like:

=SUM(INDEX(C:C,MATCH(9.9E307,F:F)):INDEX(C:C,MATCH(9.9E307,C:C)-4))

 

[Norie]

deleted

 

[Aladin Akyurek]

Hello Aladin,

Yes, I am on Excel 2003.

Rachel

That's just great. This version's list functionality allows you to largely avoid naming ranges by means of dynamic formulas like the one with OFFSET you posted.

Instead of "MyRange" with the definition:

=OFFSET(Historical!$D$3,0,0,COUNT(Historical!$D:$D),1)

put a label in D2 on Historical, select the current range in D from D2 on, activate Data|List|Create List. Formulas which refer to this list range will be automatically updated whenever the list expands or crimps.

Suppose the current range is D3:D60. After you turned D2:D60 into a list, try:

A2:

=MATCH(9.99999999999999E+307,Historical!D3:D60)

B2:

=SUM(INDEX(Historical!D3:D60,A1-MIN(5,A1)+1):INDEX(Historical!D3:D60,A1))