counting range

[saman110 via OfficeKB.com]

In column A I have numbers. How can I in column B start a count from 1 each
time that I get different number. For example:


What I have:

A

200
200
200
200
788
788
788
922
922
922
922

The result:

A B

200 1
200 2
200 3
200 4
788 1
788 2
788 3
922 1
922 2
922 3
922 4

 

[RobN]

Put 1 in B1
and =IF(A2=A1,B1+1,1) in B2 and copy down.

Rob

 

[T. Valko]

One way:

Numbers in the range A1:A11

Enter 1 in cell B1

Enter this frmula in B2 and copy down to B11:

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

 

[Teethless mama]

In B1: =COUNTIF(A$1:A1,A1)

copy down as far as needed