Filter rows in a measure

[BeatGF]

I calculate an average value, but not all rows are filled in the original data. These I want to filter this and only return rows containing data in all columns.

Here the data after the caluculation of the average:

I can achieve this by setting a filter in the "filter pane" in the Desktop App.

But, how can I do this in DAX?

Here my code:

LocalCountOfAccicentsAvg = 
VAR Known =
    FILTER (
        SELECTCOLUMNS (
            ALLSELECTED ('Date'[Date]),
            "Known[X]", 'Date'[Date],
            "Known[Y]", CALCULATE(sum(KpiData[LocalCountOfAccidents]))
        ),
        AND ( 
            NOT ( ISBLANK ( Known[X] ) ), 
            NOT ( ISBLANK ( Known[Y] ) )
        )
    )
VAR Count_Items =
    COUNTROWS ( Known )
VAR Sum_X = SUMX ( Known, Known[X] )
VAR Sum_X2 = SUMX ( Known, Known[X] ^ 2 )
VAR Sum_Y = SUMX ( Known, Known[Y] )
VAR Sum_XY = SUMX ( Known, Known[X] * Known[Y] )
VAR Average_X = AVERAGEX ( Known, Known[X] )
VAR Average_Y = AVERAGEX ( Known, Known[Y] )
VAR Slope = DIVIDE (
        Count_Items * Sum_XY - Sum_X * Sum_Y,
        Count_Items * Sum_X2 - Sum_X ^ 2
    )
VAR Intercept = Average_Y - Slope * Average_X
VAR AllData = SUMX ( DISTINCT ( 'Date'[Date] ),
    Intercept + Slope * 'Date'[Date])
RETURN AllData 

 Thanks!

[mahoneypat]

I think the only issue with your code is not having the [ ]  around your table names in the ISBLANKs.  I would not use [] in your virtual column names, to simplify things.  I would just use "KnownY" and "KnownX" when naming your columns in the SELECTCOLUMNS.

Regards,

Pat