Numbering Duplicates
 

Hi,

Could someone help me with a formula for the following?

I have a list of data which I would like to highlight the duplicates in.
Basically I would like to add a column which would prefix the value by a
number which would increase by each duplicate

AAAA
AAAA
AABA
AABA
AACA
AADA

Would become

1_AAAA
2_AAAA
1_AABA
2_AABA
1_AACA
1_AADA

Etc etc.....Can anyone help?

Thanks

Numbering Duplicates
 

in B1, enter:
=COUNTIF($A$1:$A1,A1)&"_"&A1
and copy down


HTH
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AP

"Edgar Thoemmes" a écrit dans le
message de news: ...
Hi,

Could someone help me with a formula for the following?

I have a list of data which I would like to highlight the duplicates in.
Basically I would like to add a column which would prefix the value by a
number which would increase by each duplicate

AAAA
AAAA
AABA
AABA
AACA
AADA

Would become

1_AAAA
2_AAAA
1_AABA
2_AABA
1_AACA
1_AADA

Etc etc.....Can anyone help?

Thanks