cummulative sum

Hi everyone...

I need to figure out how to create a new variable that is a cumulative sum of an existing variable with conditions. an example is below where sumnumber is what i am trying to create. any help would be appreciated. thanks.



subject visit number sumnumber
1000 1 5 5
1000 3 6 11
1000 4 2 13
1000 7 4 17
2000 1 0 0
2000 2 2 2
2000 3 0 2
3000 4 5 5
4000 1 2 2
4000 4 2 4

Try

=IF(A1=A2,D1+C2,C2) copied down

Where A1=Subject title, A2=first entry
C1=Number title, C2=first entry

And D2 is where you star entering your data.

seemed to work pretty good. thanks.

Assuming that subject is sorted as your example shows:

D2: =C2
D3: =IF(A3=A2,D2+C3,C3)

copy D2 down as far as necessary.

In article <chiapas77.21skoa_1137522910.9832@excelforum-nospam.com>,
chiapas77 <chiapas77.21skoa_1137522910.9832@excelforum-nospam.com>
wrote:

> Hi everyone...
>
> I need to figure out how to create a new variable that is a cumulative
> sum of an existing variable with conditions. an example is below where
> sumnumber is what i am trying to create. any help would be appreciated.
> thanks.
>
>
>
> subject visit number sumnumber
> 1000 1 5 5
> 1000 3 6 11
> 1000 4 2 13
> 1000 7 4 17
> 2000 1 0 0
> 2000 2 2 2
> 2000 3 0 2
> 3000 4 5 5
> 4000 1 2 2
> 4000 4 2 4