Who knows why you used it? I certainly don't (well actually I do, but it is
not necessary (see later).

I quote from that article, ...

There is no situation that I know of whereby a solution using -- could not
be achieved somehow with a '*'. Conversely, if using the TRANSPOSE function
within SUMPRODUCT, then the '*' has to be used.

In your formula, -- would have worked where you have *,. As written, * would
not have worked where you use --, because of the OR (+) condition, but just
by wrapping extra brackets around the OR conditions, you could have used *.
IMO, the worst you can do is mix them.

You could even get rid of the + with

=SUMPRODUCT(--(Odyssey!$AH$2:$AH$999={"N","U"}),
--(Odyssey!$AM$2:$AM$999<""),
--(Odyssey!$AX$2:$AX$999=DATE(2006,7,1))*(Odyssey!$ AX$2:$AX$999<=DATE(2006,
7,31)))




--
HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)

"s2m" <u23063@uwe wrote in message news:65346e330a7fa@uwe...
Thank you to who ever suggested this site
http://www.xldynamic.com/source/xld.SUMPRODUCT.html
But I am still unclear on which unary or operator to use, ,--, *, +, -

I understand by using an arithmetic operator you will get the result of
additions or subtractions.

Here is what I'm up against.

I want to count the number of N's and U's in (column AH), that fall in the
month of July (Column AX) and contains a number in (column AM)

=SUMPRODUCT(--(Odyssey!$AH$2:$AH$999="N")+(Odyssey!$AH$2:$AH$999 ="U"),--

(Odyssey!$AM$2:$AM$999<"")*(Odyssey!$AX$2:$AX$999 =DATE(2006,7,1))*(Odyssey
!
$AX$2:$AX$999<=DATE(2006,7,31)))

I am getting the correct results I just want to understand why I used *
between the dates and + between N and U and -- and the start of the
formula.

Thanks again

--
Message posted via http://www.officekb.com