SUMPRODUCT (with criteria) first N even rows in a column and then AVERAGE

[LeAnneaux]

Hi, I’m trying to average the total minutes of the first N -- in this case, 3 in lieu of N -- movies watched by a client. Please see my sheet:

docs.google.com/spreadsheets/d/1oTwnB5u7y4KqAwamvjsEats3JiTPpYhEkOqUvOzEkDE

In column A, you can see the extracted numbers from the minutes texts so that it will add up. Column B is where the movie titles along with their duration that the customer can mark Complete using the dropdown in column C. The formula, found in cell E14, I’ve used to average the said minutes is:

=SUMPRODUCT((MOD(ROW(A2:A)-ROW(A2),2)=0)*(C2:C="Complete")*(AVERAGE(OFFSET(A2:A,0,0,3))))

However, it returns an error saying the “AVERAGE caused a divide by zero error.”

Thanks for reading
LeAnneaux

 

[maabadi]

Welcome to MrExcel Message Board.
Try this Formula:

=AVERAGE(OFFSET($A$2,(ROW(A2)-ROW($A$2))*3,,9,))

9 = 3 * 3 (Interval Between Rows)

 

[maabadi]

Your formula result didn't recognize as number. I change formula to result be number at column A. then add 2 other formula at sheet to see result at E15 & E16.

=AVERAGE(OFFSET($A$2,(ROW(A2)-ROW($A$2))*2,,2*N))

=AVERAGE(INDEX(A:A,2+2*(ROW(A2)-ROW($A$2))):INDEX(A:A,2*N))

At these Formulas N can be replaced with First N numbers.

 

[maabadi]

Also I add one simpler formula to do exact work for Column A:

IF(MOD(ROW(),2)=0,LEFT($B3,FIND(" ",$B3)-1)*1,"")

if you want result by Minutes Format change it to:

IF(MOD(ROW(),2)=0,LEFT($B3,FIND(" ",$B3)-1)/1440,"")

 

[LeAnneaux]

I appreciate you going above and beyond! Though it’s missing that one tiny problem which is matching the specific criterion, as indicated in my post (C2:C="Complete").

 

[maabadi]

These Formulas At Post #4 can be used Column A.

Then Use this formula at E14. your sumproduct formula give wrong results.

if used Office365 don't need Press CTRL+SHIFT+ENTER

=AVERAGEIFS((OFFSET($A$2,,,SMALL(IF("Complete"=$C$1:$C$200,ROW($C$1:$C$200)),3))),(OFFSET($C$2,,,SMALL(IF("Complete"=$C$1:$C$200,ROW($C$1:$C$200)),3))),"Complete")

Book1
	A	B	C	D	E	F	G	H
1	Duration	Title	Status
2	90	Don Jon (2013)
3		90 minutes
4	90	Last Breath (2019)	Complete
5		90 minutes
6	114	Fear Street Part Three: 1666 (2021)
7		114 minutes
8	137	Terminator 2: Judgment Day (1991)	Complete
9		137 minutes
10	126	Hugo (2011)	Complete
11		126 minutes
12
13					Average Minutes of First 3 Movies Watched:
14					117.66667
15
16
Sheet1

Cell Formulas
Range	Formula
A2:A11	A2	=IF(MOD(ROW(),2)=0,LEFT($B3,FIND(" ",$B3)-1)*1,"")
E14	E14	=AVERAGEIFS((OFFSET($A$2,,,SMALL(IF("Complete"=$C$1:$C$200,ROW($C$1:$C$200)),3))),(OFFSET($C$2,,,SMALL(IF("Complete"=$C$1:$C$200,ROW($C$1:$C$200)),3))),"Complete")
Press CTRL+SHIFT+ENTER to enter array formulas.

 

[LeAnneaux]

Hey sorry to bother you again, but I’m not sure where I went wrong? It says argument must be a range.

 

[maabadi]

Please Paste Full formula here to I can see & check it? this is my last formula:

=AVERAGEIFS((OFFSET($A$2,,,SMALL(IF("Complete"=$C$1:$C$200,ROW($C$1:$C$200)),3))),(OFFSET($C$2,,,SMALL(IF("Complete"=$C$1:$C$200,ROW($C$1:$C$200)),3))),"Complete")

 

[RoryA]

For Sheets, try:

=average(filter(A2:A,C2:C="Complete",ROW(A2:A)<=LARGE(FILTER(ROW(A2:A),C2:C="Complete"),3)))