I'm trying to use a function (WEEKNUM) as the criteria for a range in
COUNTIF. Is this possible?

No you can't, and you cannot even use it in SUMPRODUCT because WEEKNUM will
not handle an array of dates. So you have to craft your own

=SUMPRODUCT(--(1+INT(($A$2:$A$20-(DATE(YEAR($A$2:$A$20),1,2)-WEEKDAY(DATE(YEAR($A$2:$A$20),1,1))))/7)=1))

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HTH

Bob


(there's no email, no snail mail, but somewhere should be gmail in my addy)



wrote in message
...
I'm trying to use a function (WEEKNUM) as the criteria for a range in
COUNTIF. Is this possible?

Try with SUMPRODUCT.

Pete

On May 22, 6:52*am, wrote:
I'm trying to use a function (WEEKNUM) as the criteria for a range in
COUNTIF. *Is this possible?

See my comment on SP.

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HTH

Bob


(there's no email, no snail mail, but somewhere should be gmail in my addy)



"Pete_UK" wrote in message
...
Try with SUMPRODUCT.

Pete

On May 22, 6:52 am, wrote:
I'm trying to use a function (WEEKNUM) as the criteria for a range in
COUNTIF. Is this possible?