SUMPRODUCT more help

[Guest]

I have a column of dates and a corresponding column of values that are
actually functions converting a foreign currency amount into USD. I want to
create a month-to-date total in a single cell by using SUMPRODUCT. What I am
using is:

=SUMPRODUCT(--(YEAR($A$15:$A$1000)=YEAR($C$7)),--(MONTH($A$15:$A$1000)=MONTH($C$7)),$B$15:$B$1000)

But I am getting the #VALUE! error message. Some of the cells in the dates
array are blank, and there may be a cell in the values array that has an
error because the values are functions themselves. How can I fix this? If I
can assure that none of the cells in the value array have errors will that
make it easier?

 

[Dave R.]

If any of the cells have VALUE errors, you'll get that message. Blank cells
are OK. If the cell contains some text, you'll be fine with the way your
formula is written.

You can count error messages in a range with;

=SUMPRODUCT(--ISERROR(A1:A100))

 

[Bob Phillips]

Personally, I would fix the data and ensure there are no errors there.

 

[Guest]

There are no errors, but I am still coming up with the #VALUE! error message
using SUMPRODUCT(). I've tried a few things, changing the formula and using
a dummy dataset, but I couldn't figure out why I was getting the error.
Fortunately I found a SUMIF variation that worked instead, but I'm still
curious what's causing the error in SUMPRODUCT.

 

[Bob Phillips]

Show us the SUMIF variation that works, and we might be able to figure it.

 

[Guest]

You'll get that error if your arrays contain a non-numeric header. If row 15
contains the name of your field, for example.

 

[Guest]

Someone suggested using =SUMIF(A:A,">"&(TODAY()-DAY(TODAY())),B:B)

I adapted that into
=SUMPRODUCT(--($A$15:$A$1000>($Z$7-DAY($Z$7))),--($A$15:$A$1000<=$Z$7),Z$15:Z$1000)

This version worked. Something in the MONTH() and YEAR() was giving me the
#VALUE! error. I thought it might be the headers, but when I excluded those
from the array I still got the error. The experience has been worthwhile
though because it's forced me to learn much more about SUMPRODUCT.