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sumproduct

Posted on 2011-09-21
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Last Modified: 2012-05-12
See attached spreadsheet.  On the totals sheet, I need the yellow cells to count the number of records on sheet "R" column V.  I can't change the format in column V.  I'm sure there is an easy solution but I can't seem to figure it out.

Below is my attempt to try to solve this.  Can you help?

=SUMPRODUCT(--(TEXT('R'!$V$2:$V$30,"mmmyy")=TEXT(A3,"mmmyy")>0))


Thanks!
test.xls
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Question by:dddw
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Expert Comment

by:dlmille
ID: 36578643
Quick question - are you trying to count number of dates for the month and year, or number of dates (in the other sheet) that match the date in column A (I think the latter, but checking - as your formula converts to MMMYY)...

Dave
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Expert Comment

by:reitzen
ID: 36578660
An array formula can provide you with the solution you are looking for.

If you are not familiar with array functions, you are comparing several things in your range before the formula returns "true".  In this case, you are asking for the month, day, and year to be true before returning "1".  The SUM function adds up all TRUE instances.

When entering an array function, you do not enter the curly brackets.  They are inserted for you when you press CTRL + SHIFT + ENTER after the formula.  So, if you want to copy the formula below, do not include the curly brackets when you highlight the formula.  Paste what you've copied into the cell and press CTRL + SHIFT + ENTER to enter the array formula.
{=SUM((MONTH('R'!$V$2:$V$30)=MONTH(A2))*(DAY('R'!$V$2:$V$30)=DAY(A2))*(YEAR('R'!$V$2:$V$30)=YEAR(A2))*1)}

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Assisted Solution

by:dlmille
dlmille earned 500 total points
ID: 36578664
For the individual date count, use this formula:

=SUMPRODUCT(--(A2=DATEVALUE('R'!$V$2:$V$30)))


A quick way to see if your comparisons will work, setup an equality on a limited number of datapoints... E.g, in a random cell, type:

  =A2=DATEVALUE('R'!$V$2:$V$30)  

then select the entire formula and hit F9 - that's how I review to see what the result would be.  Then, it was just a case of wrapping a counting function like SUMPRODUCT with -- to count the TRUE's

See attached...

Dave
test.xls
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LVL 41

Accepted Solution

by:
dlmille earned 500 total points
ID: 36578669
@dddw - of course, you were on the right track, and although I like to use DATEVALUE to get at the day date, independent of time, you could also have used:

=SUMPRODUCT(--(TEXT(A2,"MMDDYY")=TEXT('R'!$V$2:$V$30,"MMDDYY")))

Cheers,

Dave
test-r1.xls
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Author Comment

by:dddw
ID: 36580320
Thank you!  Both of those solutions work great.  I appreciate the information.  
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