AVERAGE ONLY A SPECIFIC NUMBER OF VALUES IN A LONGER LIST OF VALUES
I am trying to average a set number of values in a longer list of values. However, the values in the list must meet a specific criteria to be considered for the average.
For example, in Column A, I have 500 values that indicate the ranks of race results from 5 different disciplines. Column B indicates the discipline for each value:
Rank
Discipline
3
DH
21
SG
7
SL
6
GS
10
DH
12
SG
For ease, let's assume that there are 100 entries for each of the 5 disciplines, for a total of 500 entries. First, I'd like the equation to recognize that the value is from only 1 of the 5 disciplines (i.e.
SG). Second, once it has recognized all of the
entries from a given discipline, I only want it to calculate the average for the 20 most recent entries (Remember, there are 100 total entries for a discipline.), not all 100 entries.
If possible, I'm hoping to do this without VBA, Pivot Tables, or Filters because I have another slew equations reading the raw data set, which would be negatively affected if I processed the raw data with pivots, etc.
Thanks.
Solutions to the Problem AVERAGE ONLY A SPECIFIC NUMBER OF VALUES IN A LONGER LIST OF VALUES
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I've incorporated a 'helper' column that contains an arrayed LARGE()/IF() formula to gain the 20th date and used that in more traditional AVERAGEIFS() formulas for the following:
Figure 1.0 - Dated Averages
First, I'd like the equation to recognize that the value is from only 1 of the 5 disciplines (i.e.
SG).
Column F contains an average of the Rank column (A) if the Discipline matches the value in E.
=AVERAGEIFS(A$2:A$501,B$2:B$501,E2)
Second, once it has recognized all of the entries from a given discipline, I only want it to calculate the average for the 20 most recent entries
I didn't know what you meant by "most recent entries" so I created a column of random dates in column C.
Column G uses LARGE() and IF() in an array formula to get the 20th most recent date for the Discipline in column E.
=LARGE(IF(B$2:B$501=E2,C$2:C$501,0),G$1)
(press CTRL+SHIFT+
G1 contains 20 with Custom Number Formatting as 0"th Date Rank".
With the 20th Date Rank in column G, column H can use this in a AVERAGEIFS() formula.
=AVERAGEIFS(A$2:A$501,B$2:B$501,E2,C$2:C$501,">="&G2)
Sample worksheet at:
http://cid-161352ce07628e22.office.live.com/view.aspx/Social%20Answers%20Examples/Dated%20Average.xlsx
"Have you tried turning it off and then on again?" - Roy from 'The IT Crowd' (Emmy award-winning British comedy)
Hmm, This can lead to erroneous results if there are more than one values for the same discpline and the same date as the 20th rank of that discipline.
I think you need something like
http://sulprobil.com/html/sbsumlast.html to be on the safe side.
Regards,
Bernd
http://www.sulprobil.com/html/excel_forums.html
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