Sequence a number only if another cell changes

[Chapster5]

OK real simple one I just can't think how to do it...

I have a column A which is where I want my numbering to count up

Column B has company names In

All the company names are In order but there are multiples of the same company name so:

Abc
Abc
Abc
Abc
Def
Def
Ghi
Ghi
Ghi

And so on basically I need column A to count up only if Column B changes so I need

1 abc
1 abc
1 abc
1 abc
2 def
2 def
3 ghi
3 ghi
3 ghi

If that makes sense?

Anyone able to shed some light?

Many thanks!

Nick

 

[oldbrewer]

[TABLE="width: 320"]
<colgroup><col width="64" span="5" style="width:48pt"> </colgroup><tbody>[TR]
[TD="width: 64, align: right"]1[/TD]
[TD="width: 64"]abc[/TD]
[TD="width: 64"][/TD]
[TD="width: 64"][/TD]
[TD="width: 64"][/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD]abc[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD]abc[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD]abc[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD]def[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD]def[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD]ghi[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD]ghi[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD]ghi[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD="colspan: 2"]formula in A2[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD="colspan: 2"]=IF(B2=B1,A1,A1+1)[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]

 

[Chapster5]

[TABLE="width: 320"]
<colgroup><col width="64" span="5" style="width:48pt"> </colgroup><tbody>[TR]
[TD="width: 64, align: right"]1[/TD]
[TD="width: 64"]abc[/TD]
[TD="width: 64"][/TD]
[TD="width: 64"][/TD]
[TD="width: 64"][/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD]abc[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD]abc[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD]abc[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD]def[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD]def[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD]ghi[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD]ghi[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD]ghi[/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD="colspan: 2"]formula in A2[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD="colspan: 2"]=IF(B2=B1,A1,A1+1)[/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
</tbody>[/TABLE]

Thats perfect thank you!