Count Consecutive string of same number

[andy]

Hi,
I would like to find a formula that will give me the largest consecutive
sting of numbers out of a list. Here is an example of the list (A1:A10000):
this answer is 3.

A
1
1
blank
1
blank
1
1
1

Thanks!

 

[T. Valko]

Are the numbers to count *really* 1s?

So, you want to find the longest streak of contiguous consecutive 1s?

 

[ryguy7272]

It's not the most eloquent way, but here is ONE way:
http://www.ozgrid.com/forum/showthread.php?t=71645

 

[B. R.Ramachandran]

Hi,

Excel experts may have much more elegant solutions to your problem. Anyway...

Create a helper column (say Column B) as follows.

In B1, enter the formula:
=IF(ISNUMBER(A1),1,0)

In B2, enter the following formula and fill down to the end of the column.
=IF(ISNUMBER(A2),B1+1,0)

In some other cell, say C1 enter the formula:
=MAX(B:B)

C1 will display the length of the longest consecutive string of numbers.

Please click "Yes" if this is helpful.

Regards,
B. R. Ramachandran

 

[ryguy7272]

Hello andy! Your answer is here:
http://www.ozgrid.com/forum/showthread.php?t=71645

 

[ryguy7272]

http://www.ozgrid.com/forum/showthread.php?t=71645

 

[B. R.Ramachandran]

Hi,

My previous suggestion will count the length of the longest string of ANY
numbers.

To find the length of the longest SAME-number string, use the following
formula in B2.

=IF(ISNUMBER(A2),IF(A2=A1,B1+1,1),0)

The formulas in B1 and C1 are still the same as in my previous reply.

This approach will count the longest string of same numbers even when the
data contain different numbers. For example, 0 1 1 1 empty 2 2 1 1
1 1 3 1 will return 4. It will work for your data as well there are
only 1s.

Please click "Yes" if this is helpful.

Regards,
B. R. Ramachandran