#### How to count the maximum number of consecutives?

```I need to determine the maximum number of consecutive negative numbers in a
column.  The column contains formulas that evaluate to a positive number, a
negative number, zero or "" (blank).  I cannot add an additional column.  The
following are the results of formulas in cells A1:A11 that need a formula in
A12 that evaluates to 3, the maximum number of consecutive negative numbers
counting cells A2, A6 and A7.

1
-2
""
""
""
-6
-7
8
-9
""
-11

```
 0
Utf
1/1/2010 9:17:01 PM
excel.worksheet.functions 4936 articles. 2 followers.

9 Replies
2081 Views

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```You're sure you can't us an extra column somewhere??  Even a hidden one?
There are many examples of how to do this published on the internet (search
for a phrase like "find sequence of negative numbers in excel" and you'll see
them).  But almost all involve a 'helper' column.  My own solution required a
helper column also, and I was looking for one without it.
Could you accept a User Defined Function (a VB macro that you can use on a
worksheet just like a built in function)?

"JP" wrote:

> I need to determine the maximum number of consecutive negative numbers in a
> column.  The column contains formulas that evaluate to a positive number, a
> negative number, zero or "" (blank).  I cannot add an additional column.  The
> following are the results of formulas in cells A1:A11 that need a formula in
> A12 that evaluates to 3, the maximum number of consecutive negative numbers
> counting cells A2, A6 and A7.
>
> 1
> -2
> ""
> ""
> ""
> -6
> -7
> 8
> -9
> ""
> -11
>
```
 0
Utf
1/2/2010 1:30:01 AM
```Try this array formula** :

=MAX(FREQUENCY(IF(A1:A11<0,ROW(A1:A11)),IF(A1:A11>=0,IF(A1:A11<>"",ROW(A1:A11)))))

** array formulas need to be entered using the key combination of
CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the SHIFT
key then hit ENTER.

--
Biff
Microsoft Excel MVP

"JP" <JP@discussions.microsoft.com> wrote in message
news:29043AFA-6F71-42EB-992A-2AA4547BAFEF@microsoft.com...
>I need to determine the maximum number of consecutive negative numbers in a
> column.  The column contains formulas that evaluate to a positive number,
> a
> negative number, zero or "" (blank).  I cannot add an additional column.
> The
> following are the results of formulas in cells A1:A11 that need a formula
> in
> A12 that evaluates to 3, the maximum number of consecutive negative
> numbers
> counting cells A2, A6 and A7.
>
> 1
> -2
> ""
> ""
> ""
> -6
> -7
> 8
> -9
> ""
> -11
>

```
 0
T
1/2/2010 3:38:39 AM
```Thanks very much for your reply but I can't use a hidden column and I need to
avoid user-defined functions and macros.  If it is not possible using a
formula or array formula, then at least I'll know that and can stop
trying--so I appreciate your help.

"JLatham" wrote:

> You're sure you can't us an extra column somewhere??  Even a hidden one?
> There are many examples of how to do this published on the internet (search
> for a phrase like "find sequence of negative numbers in excel" and you'll see
> them).  But almost all involve a 'helper' column.  My own solution required a
> helper column also, and I was looking for one without it.
> Could you accept a User Defined Function (a VB macro that you can use on a
> worksheet just like a built in function)?
>
>
> "JP" wrote:
>
> > I need to determine the maximum number of consecutive negative numbers in a
> > column.  The column contains formulas that evaluate to a positive number, a
> > negative number, zero or "" (blank).  I cannot add an additional column.  The
> > following are the results of formulas in cells A1:A11 that need a formula in
> > A12 that evaluates to 3, the maximum number of consecutive negative numbers
> > counting cells A2, A6 and A7.
> >
> > 1
> > -2
> > ""
> > ""
> > ""
> > -6
> > -7
> > 8
> > -9
> > ""
> > -11
> >
```
 0
Utf
1/2/2010 9:50:01 AM
```Thank you for your reply.  This is the type of solution I've been looking for
but it evaluates incorrectly to 2 rather than 3 (using my example).

"T. Valko" wrote:

> Try this array formula** :
>
> =MAX(FREQUENCY(IF(A1:A11<0,ROW(A1:A11)),IF(A1:A11>=0,IF(A1:A11<>"",ROW(A1:A11)))))
>
> ** array formulas need to be entered using the key combination of
> CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the SHIFT
> key then hit ENTER.
>
> --
> Biff
> Microsoft Excel MVP
>
>
> "JP" <JP@discussions.microsoft.com> wrote in message
> news:29043AFA-6F71-42EB-992A-2AA4547BAFEF@microsoft.com...
> >I need to determine the maximum number of consecutive negative numbers in a
> > column.  The column contains formulas that evaluate to a positive number,
> > a
> > negative number, zero or "" (blank).  I cannot add an additional column.
> > The
> > following are the results of formulas in cells A1:A11 that need a formula
> > in
> > A12 that evaluates to 3, the maximum number of consecutive negative
> > numbers
> > counting cells A2, A6 and A7.
> >
> > 1
> > -2
> > ""
> > ""
> > ""
> > -6
> > -7
> > 8
> > -9
> > ""
> > -11
> >
>
>
> .
>
```
 0
Utf
1/2/2010 9:57:01 AM
```My error, it evaluates perfectly.  Thank you so much, T. Valko!  I've been
working on this for a long time and it's finally solved thanks to you.

Best regards,
JP

"JP" wrote:

> Thank you for your reply.  This is the type of solution I've been looking for
> but it evaluates incorrectly to 2 rather than 3 (using my example).
>
> "T. Valko" wrote:
>
> > Try this array formula** :
> >
> > =MAX(FREQUENCY(IF(A1:A11<0,ROW(A1:A11)),IF(A1:A11>=0,IF(A1:A11<>"",ROW(A1:A11)))))
> >
> > ** array formulas need to be entered using the key combination of
> > CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the SHIFT
> > key then hit ENTER.
> >
> > --
> > Biff
> > Microsoft Excel MVP
> >
> >
> > "JP" <JP@discussions.microsoft.com> wrote in message
> > news:29043AFA-6F71-42EB-992A-2AA4547BAFEF@microsoft.com...
> > >I need to determine the maximum number of consecutive negative numbers in a
> > > column.  The column contains formulas that evaluate to a positive number,
> > > a
> > > negative number, zero or "" (blank).  I cannot add an additional column.
> > > The
> > > following are the results of formulas in cells A1:A11 that need a formula
> > > in
> > > A12 that evaluates to 3, the maximum number of consecutive negative
> > > numbers
> > > counting cells A2, A6 and A7.
> > >
> > > 1
> > > -2
> > > ""
> > > ""
> > > ""
> > > -6
> > > -7
> > > 8
> > > -9
> > > ""
> > > -11
> > >
> >
> >
> > .
> >
```
 0
Utf
1/2/2010 10:03:01 AM
```This works perfectly, many many thanks and happy New Year to you.

"T. Valko" wrote:

> Try this array formula** :
>
> =MAX(FREQUENCY(IF(A1:A11<0,ROW(A1:A11)),IF(A1:A11>=0,IF(A1:A11<>"",ROW(A1:A11)))))
>
> ** array formulas need to be entered using the key combination of
> CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the SHIFT
> key then hit ENTER.
>
> --
> Biff
> Microsoft Excel MVP
>
>
> "JP" <JP@discussions.microsoft.com> wrote in message
> news:29043AFA-6F71-42EB-992A-2AA4547BAFEF@microsoft.com...
> >I need to determine the maximum number of consecutive negative numbers in a
> > column.  The column contains formulas that evaluate to a positive number,
> > a
> > negative number, zero or "" (blank).  I cannot add an additional column.
> > The
> > following are the results of formulas in cells A1:A11 that need a formula
> > in
> > A12 that evaluates to 3, the maximum number of consecutive negative
> > numbers
> > counting cells A2, A6 and A7.
> >
> > 1
> > -2
> > ""
> > ""
> > ""
> > -6
> > -7
> > 8
> > -9
> > ""
> > -11
> >
>
>
> .
>
```
 0
Utf
1/2/2010 10:05:01 AM
```I finally understand how this is working.  It's a brilliant and elegant
solution that is greatly appreciated.  Thanks once again, Biff and happy
trails.

JP

"T. Valko" wrote:

> Try this array formula** :
>
> =MAX(FREQUENCY(IF(A1:A11<0,ROW(A1:A11)),IF(A1:A11>=0,IF(A1:A11<>"",ROW(A1:A11)))))
>
> ** array formulas need to be entered using the key combination of
> CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the SHIFT
> key then hit ENTER.
>
> --
> Biff
> Microsoft Excel MVP
>
>
> "JP" <JP@discussions.microsoft.com> wrote in message
> news:29043AFA-6F71-42EB-992A-2AA4547BAFEF@microsoft.com...
> >I need to determine the maximum number of consecutive negative numbers in a
> > column.  The column contains formulas that evaluate to a positive number,
> > a
> > negative number, zero or "" (blank).  I cannot add an additional column.
> > The
> > following are the results of formulas in cells A1:A11 that need a formula
> > in
> > A12 that evaluates to 3, the maximum number of consecutive negative
> > numbers
> > counting cells A2, A6 and A7.
> >
> > 1
> > -2
> > ""
> > ""
> > ""
> > -6
> > -7
> > 8
> > -9
> > ""
> > -11
> >
>
>
> .
>
```
 0
Utf
1/2/2010 1:32:01 PM
```You're welcome. Thanks for the feedback!

--
Biff
Microsoft Excel MVP

"JP" <JP@discussions.microsoft.com> wrote in message
news:A5D8D2FD-C20A-4915-A3BA-154735D00967@microsoft.com...
>I finally understand how this is working.  It's a brilliant and elegant
> solution that is greatly appreciated.  Thanks once again, Biff and happy
> trails.
>
> JP
>
>
> "T. Valko" wrote:
>
>> Try this array formula** :
>>
>> =MAX(FREQUENCY(IF(A1:A11<0,ROW(A1:A11)),IF(A1:A11>=0,IF(A1:A11<>"",ROW(A1:A11)))))
>>
>> ** array formulas need to be entered using the key combination of
>> CTRL,SHIFT,ENTER (not just ENTER). Hold down both the CTRL key and the
>> SHIFT
>> key then hit ENTER.
>>
>> --
>> Biff
>> Microsoft Excel MVP
>>
>>
>> "JP" <JP@discussions.microsoft.com> wrote in message
>> news:29043AFA-6F71-42EB-992A-2AA4547BAFEF@microsoft.com...
>> >I need to determine the maximum number of consecutive negative numbers
>> >in a
>> > column.  The column contains formulas that evaluate to a positive
>> > number,
>> > a
>> > negative number, zero or "" (blank).  I cannot add an additional
>> > column.
>> > The
>> > following are the results of formulas in cells A1:A11 that need a
>> > formula
>> > in
>> > A12 that evaluates to 3, the maximum number of consecutive negative
>> > numbers
>> > counting cells A2, A6 and A7.
>> >
>> > 1
>> > -2
>> > ""
>> > ""
>> > ""
>> > -6
>> > -7
>> > 8
>> > -9
>> > ""
>> > -11
>> >
>>
>>
>> .
>>

```
 0
T
1/2/2010 4:12:16 PM
```As you now know, there's almost always a solution (key word 'almost'), and in
this case I just kind of figured if Biff couldn't do it, it couldn't be done.
Glad he was able to solve your problem.

"JP" wrote:

> Thanks very much for your reply but I can't use a hidden column and I need to
> avoid user-defined functions and macros.  If it is not possible using a
> formula or array formula, then at least I'll know that and can stop
> trying--so I appreciate your help.
>
> "JLatham" wrote:
>
> > You're sure you can't us an extra column somewhere??  Even a hidden one?
> > There are many examples of how to do this published on the internet (search
> > for a phrase like "find sequence of negative numbers in excel" and you'll see
> > them).  But almost all involve a 'helper' column.  My own solution required a
> > helper column also, and I was looking for one without it.
> > Could you accept a User Defined Function (a VB macro that you can use on a
> > worksheet just like a built in function)?
> >
> >
> > "JP" wrote:
> >
> > > I need to determine the maximum number of consecutive negative numbers in a
> > > column.  The column contains formulas that evaluate to a positive number, a
> > > negative number, zero or "" (blank).  I cannot add an additional column.  The
> > > following are the results of formulas in cells A1:A11 that need a formula in
> > > A12 that evaluates to 3, the maximum number of consecutive negative numbers
> > > counting cells A2, A6 and A7.
> > >
> > > 1
> > > -2
> > > ""
> > > ""
> > > ""
> > > -6
> > > -7
> > > 8
> > > -9
> > > ""
> > > -11
> > >
```
 0
Utf
1/2/2010 11:19:01 PM

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Absolute maximum
Hello All Can some one please show me how to find the absolute maximum (x & y) from a 4th order polynomial equation... Excel tells me the equation is; Y=-0.007x�+0.0321x�-0.4409x+3.6696 The equation was derived from the following x,y points; (12.27,1.721),(14.43,1.762),(17.03,1.808),(19.22,1.790) I know the absolute maximum is approx (17.6,1.810) by physically graphing and then reading of the max point but is there any way Excel can calculate this for me? Any thoughts appreciated, thanx in advance Matt ** Posted via: http://www.ozgrid.com Excel Templates, Training, Add-ins & Bus...

Counting days
Have the following fields in a table: Date,Name,JobNo,Hours. I need a SQL query to count the number of days each Name appears over a period of days. Any Name can appear more than once on any Date. If a Name appeared three times on the same Date it should only count as one day. Any suggestions or help would be appreciated Thanks Phil_mac SELECT name, COUNT(*) FROM (SELECT DISTINCT name, [date] FROM tableName WHERE [date] BETWEEN firstDate AND lastDate) AS a GROUP BY name where firstDate and lastDate are parameters defining the range of date of your interest. ...