Table - Diagram
Inside the diagram i use this definition:
=Aggr(if (IsNull(T.OVO_ID) or T.OVO_ID = '','no Message',Count(DISTINCT [T.Incident Number])), T.OVO_ID)
Count(DISTINCT [T.Incident Number])
Column(2) - Column(1)
I want to do something like this
If (Dimension(1) = 'no Messages', ...., ...)
With the function Column(x) I have access to the column value, but how is the dimension value available?
If I understand you correctly, you want some shorthand like Column(n) to access an expression column, but to access a dimension instead?
The short answer is that this would be useful, I don't think that is possible, but you can use the dimension expression in you if expression:
If(<dimension expression here> ='no Messages', ...)
Hope that helps