It's because blank cells return zero when evaluated thus to avoid blank
cells skewing the result when 0 is a condition one can either
check for number like in

=ISNUMBER(Range)

or not empty

=Range<""


--

Regards,

Peo Sjoblom

"Kleev" wrote in message
...
Rather than speculate, I will ask, why do you need the 2:2<""? I tried
this
out, and found you do need it (if there is a 1 in row 1,) but if I say
anything else, I will be speculating.

"Bob Phillips" wrote:

=SUMPRODUCT(--(1:1=1),--(2:2=0),--(2:2<""))

--

HTH

RP
(remove nothere from the email address if mailing direct)


"Scott" wrote in message
...
I am working with two rows of data, I want to count the number of
times
that
both rows are equal to a value I specify. Something like this
COUNTIF(1:1,
AND(1:X="1", 2:X="0")). Given the table below, the formula should be
equal
to
two.

A B C D E F G H I J K
1 0 0 1 0 0 1 0 0 1 0 1
2 1 0 0 1 0 1 0 0 0 1 1


--
Scott Miller
University of Washington
Chemistry