How to take values from previous month

[#1]

Hello

I'm trying to create a chart with opened cases, closed and remaining cases.

And I was only able to create something la this (see picture below) , but is not good.

You can see now that the remaining cases is difference between 'Opened' and 'Closed', but I want to be different.

I want Remaining cases to take the cases that are still opened from previous month, in the current month. For example if I have 2 cases in 09/2014 which was closed in 10/2014, in 10/2014 I should have these 2 cases.

I have a 'formula' for the remaining cases, but I don't know how to take the values from the previous month.

remaining in month M = Remaining Month M-1 + Open cases on Month M – Closed Cases on Month M

Please keep in mind that Closed cases on Month M = Created Cases which has been closed during month M +  Created Cases in previous month which has been closed in month M.

FYI : The closed cases are those which has 'closedMonth'.

Thanks!

[swuehl]

If possible, post a small sample QVW, that makes it easier to understand your data model and create a solution.

In general, you can try enabling the full accumulation mode on expression tab for that remaining cases expression.

Or using rangesum(above()) to accumulate your values, maybe something like

=Rangesum(Above (FullExpressionToCalculateRemaining), 0, rowno() ))

Edit: Replace FullExpressionToCalculateRemaining with your expression to calculate the remaining cases.

[Anonymous]

Try this,

  For the third expression go to Expression Tab under Accumulation select Accumulate and set value 1 for step back...This should work...