So the dynamic range adjusts the calculated cells as the range grows or
shrinks. Do the calculations need to be adjusted, or is A2:A65535 viable?
Also will it effect rows as well, or just columns?

"T. Valko" wrote:

A dynamic range is a range reference that adjusts its size automatically as
you add or remove data from the range.

For example, in your situation it sounds like you're using a range like
A2:A65535 just because you may not how much data is actually in that range
and by using (almost) the entire column as a reference you'll be guaranteed
to cover the range. That does work but in using the type of array formula
that you're using this is very inefficient because *every* cell in the
referenced range is calculated. So, if you have 60,000 empty cells in that
range you're wasting resources by having to evaluate every one of those
empty cells. It's things like this that add to slow calculation.

Assume in your example that there are actually 5000 rows of real data. In
your formula you're testing 5 columns. So if you have 60,000 empty cells per
column you're wasting resources by having to test 300,000 empty cells.

Biff

"M.A.Tyler" <Great Lakes State wrote in message
...
Thanks for the link, but what is a dynamic Range and what will it do?

"T. Valko" wrote:

It sounds like what you need to do is to use a dynamic range.

See this:

http://contextures.com/xlNames01.html#Dynamic

Biff

"M.A.Tyler" <Great Lakes State wrote in message
...
The only reason I need to use the entire column is to update the
average.
If
it was possible to save the average and the count as to how many cells
were
used to compile it, I could delete sheet1! and start fresh each time.
This
would cut the rows down from 65535 to about 2500. I would certainly be
interested if this were possible. That would help with the speed
problem!

Thank you for your help and the formula.

Best regards,

M.A.Tyler

"T. Valko" wrote:

Are you really using the entire columns?

This formula will work but it will add to the calculation time that
you
already mentioned is an issue:

Entered as an array using the key combination of CTRL,SHIFT,ENTER (not
just
ENTER):

=AVERAGE(IF((W2:W65535="Red")*(X2:X65535="Blue")*( Y2:Y65535="Yellow")*(Z2:Z65535="Green"),H2:H65535) )

Biff

"M.A.Tyler" <Great Lakes State wrote in message
...
Need to Average cells H2:H65535, where corresponding cells in
W2:W65535="Red", X2:X65535="Blue", Y2:Y65535="Yellow" and
Z2:Z65535="Green".
Need to enter the formulas in Sheet2!S2:S100.

"T. Valko" wrote:

Try rephrasing your question in terms like this:

I need to average cells A1:A100 where the corresponding cells in
B1:B100
=
"this", C1:C100 = "this", D1:D100 = "this".

Biff

"M.A.Tyler" <Great Lakes State wrote in message
...
Hello,

I'm currently using page 1 of a work book as a data base. Not
certain
thats
the best idea because opening, saving and calculating have become
slower
as
the information expands. This is not my real question, but any
feed
back
will
be welcome.

So page 1 is the database, on page 2 some calculations. Would
like
to
include matching cells from column H that meet criterian held in
columns
W,
X, Y and Z (1 each). then I would need to add and average these
cells.
Is
this possible to do in one step? Should I use a Index Match or
would a
filter be the way.

Thanks, as always for the help!

M.A.Tyler