Circular Dependency (Driving me Crazy)

[spaxia]

Hello,

I have a very simple problem that is driving me crazy:

I have a Table with the Following semplified Structure

ID, Description, Value

1, Mark, 3

2, John, 6

3, Maria, 5

I need to add a column not a measure let's call it CALC and essentially the value of CALC for each Row

depend on the Value of the previous row CALC Value. 

Whatever I do i Get a Circular Dependency. 

Please help!

Thank you so much!

[v-eachen-msft]

Hi @spaxia ,

You can use a calculated column to do it.

CALC =
CALCULATE (
    FIRSTNONBLANK ( 'Table'[Value], 1 ),
    FILTER ( 'Table', 'Table'[ID] = ( EARLIER ( 'Table'[ID] ) - 1 ) )
)

To avoid the Circular Dependency errors, you can refer to this document.

https://www.sqlbi.com/articles/avoiding-circular-dependency-errors-in-dax/

Best Regards,

Eads

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[spaxia]

Thank you Eads,

actually this is not what i want to achieve. Let me explain with more details:

I have the following scenario:

WAC it's what I want to achieve (i created the result manually) , but i cannot find a way to add such a calculted column. it should be a column since a need to reuse it in other calculations so cannot be a measure.

To give an example to calculate WAC or row 2 i do the following

(Amount + (Stock * (CALC of previous Row))) / Stock + Qty

(40 + (5 * 9)) / 5 + 5

Result would be 85/10 = 8,5 

And so on...

Thank you so much for your help

[spaxia]

Hello,

thank you so much for your help.

But actually I want something like:

CALC =
CALCULATE (
    FIRSTNONBLANK ( 'Table'[CALC], 1 ),
    FILTER ( 'Table', 'Table'[ID] = ( EARLIER ( 'Table'[ID] ) - 1 ) )
)

I would like essentially to calculate CALC based on the Previous CALC available.

Thank you so much

[v-eachen-msft]

Hi @spaxia ,

There is no recursive concept in DAX.

You have defined CALC with dax, but CALC in dax also needs to use this dax to define it, then it will fall into an endless loop. 
You can refer to the document I attached in the previous answer

Best Regards,

Eads

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.