I have a workbook that uses over 3000 sumproduct formulas to extract
data based on 7 different criteria. Works great except for calculation
time.

Is there an alternative to Sumproduct that would be faster and still
allow for sumation based on multiple criteria?

Is it possible to have Excel calculate certain cell ranges but not the
entire workbook?

Would additional RAM help? (I currently have 1 MB)

Is there a way to identify things that make calc time longer?

Thanks for any suggestions...

I don't really think so. It depends on how many rows and columns your
SUMPRODUCT's are looking at, but even with short row and column ranges, that
many SUMPRODUCT formulas are going to take forever to calculate. Any formula
based alternative, no matter how innovative would still be volatile and
therefore would still be very slow to complete calculation,
One possible way round it is to insert the formulas into the appropriate
places via a Macro and then in the same Macro copy and Paste Special Values
so that the file contains no formulas at all until the Macro(s) are run, and
indeed, no formulas after the Macro(s) are run.
You may perhaps be able to enter only the formulas that need to be
calculated in a certain circumstance rather than all of them at the same
time. This would speed up the calculation time significantly.
Obviously without being able to see your sheet its difficult to say if the
afore mentioned procedure would be feasible,
Regards,
Alan.

"Mike" wrote in message
ups.com...
I have a workbook that uses over 3000 sumproduct formulas to extract
data based on 7 different criteria. Works great except for calculation
time.

Is there an alternative to Sumproduct that would be faster and still
allow for sumation based on multiple criteria?

Is it possible to have Excel calculate certain cell ranges but not the
entire workbook?

Would additional RAM help? (I currently have 1 MB)

Is there a way to identify things that make calc time longer?

Thanks for any suggestions...

Have you tried using pivot tables? They are extremely quick and summarize
data similarly as SUMPRODUCT does.
--
Regards,

David Billigmeier



"Mike" wrote:

I have a workbook that uses over 3000 sumproduct formulas to extract
data based on 7 different criteria. Works great except for calculation
time.

Is there an alternative to Sumproduct that would be faster and still
allow for sumation based on multiple criteria?

Is it possible to have Excel calculate certain cell ranges but not the
entire workbook?

Would additional RAM help? (I currently have 1 MB)

Is there a way to identify things that make calc time longer?

Thanks for any suggestions...

One way is to reduce the number of ranges tested...

Example

Suppose we have

[A]

=SUMPRODUCT(($A$2:$A$1000=$K2)+0,($B$2:$B$1000=$L2 )+0,$C$2:$C$1000)

and we want to reduce the number of ranges tested:

D2, copied down:

=A2&"#"&B2

The formula in [A] can be re-expressed as:

[b]

=SUMIF(($D$2:$D$1000,$K2&"#"&$L2,$C$2:$C$1000)

For more ideas, see:

http://tinyurl.com/d9eom

For computing on relevant subranges instead of whole range, the
following example might be helpful:

http://tinyurl.com/cqy47

And for more, see:

http://tinyurl.com/d9eom

Mike wrote:
I have a workbook that uses over 3000 sumproduct formulas to extract
data based on 7 different criteria. Works great except for calculation
time.

Is there an alternative to Sumproduct that would be faster and still
allow for sumation based on multiple criteria?

Is it possible to have Excel calculate certain cell ranges but not the
entire workbook?

Would additional RAM help? (I currently have 1 MB)

Is there a way to identify things that make calc time longer?

Thanks for any suggestions...


--

[1] The SumProduct function should implicitly coerce the truth values to
their Excel numeric equivalents.
[2] The lookup functions should have an optional argument for the return
value, defaulting to #N/A in its absence.

Aladin,
Would you comment on the perceived advantage of using
+0
Instead of the asterisk or the unary.
--
Regards,

RD

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"Aladin Akyurek" wrote in message
...
One way is to reduce the number of ranges tested...

Example

Suppose we have

[A]

=SUMPRODUCT(($A$2:$A$1000=$K2)+0,($B$2:$B$1000=$L2 )+0,$C$2:$C$1000)

and we want to reduce the number of ranges tested:

D2, copied down:

=A2&"#"&B2

The formula in [A] can be re-expressed as:

[b]

=SUMIF(($D$2:$D$1000,$K2&"#"&$L2,$C$2:$C$1000)

For more ideas, see:

http://tinyurl.com/d9eom

For computing on relevant subranges instead of whole range, the
following example might be helpful:

http://tinyurl.com/cqy47

And for more, see:

http://tinyurl.com/d9eom

Mike wrote:
I have a workbook that uses over 3000 sumproduct formulas to extract
data based on 7 different criteria. Works great except for calculation
time.

Is there an alternative to Sumproduct that would be faster and still
allow for sumation based on multiple criteria?

Is it possible to have Excel calculate certain cell ranges but not the
entire workbook?

Would additional RAM help? (I currently have 1 MB)

Is there a way to identify things that make calc time longer?

Thanks for any suggestions...


--

[1] The SumProduct function should implicitly coerce the truth values to
their Excel numeric equivalents.
[2] The lookup functions should have an optional argument for the return
value, defaulting to #N/A in its absence.

Performancewise, +0 is very close to --, the double negation, both
better than other coercers. Invoking one as the other is a "weak"
attempt on my part to emphasize the real thing, that is, the comma
syntax, which is confounded by far too many with the coercer issue. All
this will subside when SumProduct does the coercion itself. See [1] in
my signature, which is a SumProduct-specific proposal.

RagDyer wrote:
Aladin,
Would you comment on the perceived advantage of using
+0
Instead of the asterisk or the unary.

--

[1] The SumProduct function should implicitly coerce the truth values to
their Excel numeric equivalents.
[2] The lookup functions should have an optional argument for the return
value, defaulting to #N/A in its absence.

Thanks for your answer Aladin.

This is the second time in as many days that I'm bringing up *my* issue with
the unary, or as you mention here, the "comma" syntax.

In today's world, the use of the web for mining data is as common a fact of
life as is the use of the computer itself.
They are in fact, virtually synonymous.

Data imported into XL, and the form and format of this data, is a very
common issue within these NGs.
On a daily basis, there are numerous questions pertaining to unworkable
formulas, where the ultimate solution is to "homogenize" the data forms and
formats.

The "problem" with the comma syntax is, it's *sneaky*!
In a convoluted scenario of "mixed" data, it returns a "wrong" result,
without any conspicuous declaration.
Zero is calculated for the "bad" data (numeric text as well as alpha text),
and its result is mixed in with the "good" data.

The developer completes the project and it's turned over to office staff for
implementation.
Then, let the cards fall where they may!

The asterisk form, on the other hand, *does* calculate the numeric text, and
"errors out" in the presence of alpha text, thus performing double duty.
It's the notification that's the important thing.
If you're told something's wrong, you can look for it!

There are cases where the comma form is necessary, but that's a mute point
in this discourse.

I'll get off my soap box now.<g
--

Regards,

RD
----------------------------------------------------------------------------
-------------------
Please keep all correspondence within the Group, so all may benefit !
----------------------------------------------------------------------------
-------------------



"Aladin Akyurek" wrote in message
...
Performancewise, +0 is very close to --, the double negation, both
better than other coercers. Invoking one as the other is a "weak"
attempt on my part to emphasize the real thing, that is, the comma
syntax, which is confounded by far too many with the coercer issue. All
this will subside when SumProduct does the coercion itself. See [1] in
my signature, which is a SumProduct-specific proposal.

RagDyer wrote:
Aladin,
Would you comment on the perceived advantage of using
+0
Instead of the asterisk or the unary.

--

[1] The SumProduct function should implicitly coerce the truth values to
their Excel numeric equivalents.
[2] The lookup functions should have an optional argument for the return
value, defaulting to #N/A in its absence.

RagDyeR wrote:

[...]
This is the second time in as many days that I'm bringing up *my* issue with
the unary, or as you mention here, the "comma" syntax.

To clear up any misunderstanding, I'm definitely in favor of the
comma-syntax, while you are, in fact, arguing/recommending against the
use of SumProduct's comma-syntax.


In today's world, the use of the web for mining data is as common a fact of
life as is the use of the computer itself.
They are in fact, virtually synonymous.


I don't think so. That was the point of my reply.

Data imported into XL, and the form and format of this data, is a very
common issue within these NGs.
On a daily basis, there are numerous questions pertaining to unworkable
formulas, where the ultimate solution is to "homogenize" the data forms and
formats.

Issues with numeric data, erroneously typed as text (either by user or
by the "vagaries" of the system's parser) do not constitute a valid
reason to delegate the re-solution to functions.


The "problem" with the comma syntax is, it's *sneaky*!
In a convoluted scenario of "mixed" data, it returns a "wrong" result,
without any conspicuous declaration.
Zero is calculated for the "bad" data (numeric text as well as alpha text),
and its result is mixed in with the "good" data.


Such concerns are better dealt with by means of separate formulas that
audit the data. If a range should be numeric, a simple audit formula can
verify whether that is the case. For example:

=COUNT(Range)=ROWS(Range)

As a side note, I teach this subject in my audit classes with the 3rd
year accountancy students.

The developer completes the project and it's turned over to office staff for
implementation.
Then, let the cards fall where they may!

The developer should provide an audit sheet (rarely done), regarding the
data types and the processing a spreadsheet model carries out. Auditors
(e.g., accountants) ought to require audit sheets.


The asterisk form, on the other hand, *does* calculate the numeric text, and
"errors out" in the presence of alpha text, thus performing double duty.
It's the notification that's the important thing.

A data area can consist of either user-entered values or calculated
values. There might be good reasons for using ="" or any other
text-value. Such an area becomes unprocessible by your suggestion.

If you're told something's wrong, you can look for it!

Quite so. One would be well-advised to inspect the results of
judiciously set up audit formulas.

[...]

--

[1] The SumProduct function should implicitly coerce the truth values to
their Excel numeric equivalents.
[2] The lookup functions should have an optional argument for the return
value, defaulting to #N/A in its absence.

Hi Mike,

An effectivre alternative to using the sumproduct formula could be the
Database functions of Excel i.e. functions like DSUM, DGET, DPRODUCT etc.
You will get extensive help in the HELP Menu.

Hope this information helps.

Regards,

"Mike" wrote:

I have a workbook that uses over 3000 sumproduct formulas to extract
data based on 7 different criteria. Works great except for calculation
time.

Is there an alternative to Sumproduct that would be faster and still
allow for sumation based on multiple criteria?

Is it possible to have Excel calculate certain cell ranges but not the
entire workbook?

Would additional RAM help? (I currently have 1 MB)

Is there a way to identify things that make calc time longer?

Thanks for any suggestions...