I have a spreadsheet where there are several columns with data using 
validation picklists as well as free-entry columns. I would like to create a 
summary of the data in the form of counts based on the existence of specific 
values in these columns with the ability to change the date range.  I've 
created the array formula and have set up a 'startdate' and 'enddate' cells 
where the user can enter the range they're looking for. No matter what I do 
the value always reports a zero.

I have used these types of array formulas before, however, not using date 
ranges.  Could there be something I'm missing?

DOI = Date of Incident

{=COUNT(IF(ROU_Stat="CE",IF(IncType="Near 
Miss",IF(DOI>=$C$1,IF(DOI<=$D$1,IF(Region_Stat="qc",1,0))))))}

I'd try:

=sumproduct(--(rou_stat="CE"), 
            --(inctype="near miss"), 
            --(doi>=$c$1),
            --(dou<=$d$1),
            --(region_stat="qc"))

This assumes that all the ranges contain single columns (or rows) and each have
the same number of elements.  And that DOI, DOU and C1, D1 are all real
dates--not just text that look like dates.

Adjust the ranges to match--but you can't use whole columns (except in xl2007). 

=sumproduct() likes to work with numbers.  The -- stuff changes trues and falses
to 1's and 0's.

Bob Phillips explains =sumproduct() in much more detail here:
http://www.xldynamic.com/source/xld.SUMPRODUCT.html

And J.E. McGimpsey has some notes at:
http://mcgimpsey.com/excel/formulae/doubleneg.html

Smitee2006 wrote:
> 
> I have a spreadsheet where there are several columns with data using
> validation picklists as well as free-entry columns. I would like to create a
> summary of the data in the form of counts based on the existence of specific
> values in these columns with the ability to change the date range.  I've
> created the array formula and have set up a 'startdate' and 'enddate' cells
> where the user can enter the range they're looking for. No matter what I do
> the value always reports a zero.
> 
> I have used these types of array formulas before, however, not using date
> ranges.  Could there be something I'm missing?
> 
> DOI = Date of Incident
> 
> {=COUNT(IF(ROU_Stat="CE",IF(IncType="Near
> Miss",IF(DOI>=$C$1,IF(DOI<=$D$1,IF(Region_Stat="qc",1,0))))))}

-- 

Dave Peterson