converting calculated columns to measures that use calculate function

[klehar]

Hi,

I'm trying to optimise a model that was created by someone else.

The model is complex but I need to convert some calculated columns to measures.

Please advise if calculations that contain EARLIER function can be converted to measures or not?

E.g.

Nperiod = 
CALCULATE (
    COUNT ( 'Budget'[YearMonth] ),
    FILTER (
        ALLEXCEPT ( 'Budget', 'Budget'[Budget Period] ),
        'Budget'[YearMonth] <= EARLIER ( 'Budget'[YearMonth] )
    )
) -1

This is also required because such calculations are used as part of other calculated columns which also need to be converted to measures. 

[Greg_Deckler · Accepted solution]

@klehar So yes, they can but it all depends on context. For example, if adding a column to a table using ADDCOLUMNS you can use EARLIER in a measure. In the case you are describing, depending on context, this might work:

Nperiod = 
VAR __CurrentBudget = MAX('Budget'[YearMonth])
RETURN
CALCULATE (
    COUNT ( 'Budget'[YearMonth] ),
    FILTER (
        ALLEXCEPT ( 'Budget', 'Budget'[Budget Period] ),
        'Budget'[YearMonth] <= __CurrentBudget )
    )
) -1