Add datarows using parameters in Power BI

Hi ShejalTiwari ,
According to your description, adding a column to an already fixed matrix is not supported in power bi. If you want to add a new column it is equivalent to adding several rows to the data, which is not possible with data that is already fixed. But there is a way you can try it. You can create a new matrix and display the measure separately.

SelectedCountry = 
VAR _SelectedCountry = SELECTEDVALUE('Select Country 1'[Country])
VAR _CurrentCountryList = VALUES(Sheet1[Country])
VAR _isAdded = 
IF(
    _SelectedCountry IN _CurrentCountryList,
    0,
    SELECTEDVALUE('HC % Change 1'[Headcount % Change 1])
)
RETURN
_isAdded

Sum of head count = SUM(Sheet1[Headcount])

Total = [SelectedCountry] + [Sum of head count]

Final output

Best regards,
Albert He

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