Problem calculating net change month to month

[qw_johan]

Hi

Having problem with my expression trying to calculate net change month to mounth. I am getting null value on first and second row, first row I can understand but why the second row?

Total amout = Just calculates the number of ID's for a certain period/month.

count({<Period={">=$(=$(vYearMonth))"}>}DISTINCT ID)

Net change = the difference month to month, i.e. april= april - march, 19752-19820= -68

count({<Period={">=$(=$(vYearMonth))"}>}DISTINCT ID) - above(count({<Period={">=$(=$(vYearMonth))"}>}DISTINCT ID))

I am stuck and can't figure this out.

Any help appreciated

Thanks

[techvarun]

Hi,

The Problem seems to be in  Variable Declaration 1701 is not taking the Above Value as 1612, where as 1702 for feb is taking 1701 as Above Properly.

Can you Check. Or share a sample app

[Kushal_Chawda]

would you be able to share the sample?

[qw_johan]

Hi

Thanks for your fast respons.

I have created a sample app that illustrates the problem: Test.qvw

[Kushal_Chawda]

try this

num(count({<Period={">=$(=$(vYearMonth))"}>}DISTINCT ID) - above(total count({<Period={">=$(=$(vYearMonth))"}>}DISTINCT ID)),'# ##0','.',' ')

[qw_johan]

Fantastic !!!

Using "total" solved the problem.

Thank you