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


--
chiapas77
------------------------------------------------------------------------
chiapas77's Profile: http://www.excelforum.com/member.php...o&userid=30568
View this thread: http://www.excelforum.com/showthread...hreadid=502153

cummulative sum
 

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.


--
Vito
------------------------------------------------------------------------
Vito's Profile: http://www.excelforum.com/member.php...o&userid=29182
View this thread: http://www.excelforum.com/showthread...hreadid=502153

cummulative sum
 

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
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

cummulative sum
 

seemed to work pretty good. thanks.


--
chiapas77
------------------------------------------------------------------------
chiapas77's Profile: http://www.excelforum.com/member.php...o&userid=30568
View this thread: http://www.excelforum.com/showthread...hreadid=502153