Only have a measure appear when a specific slicer selection is made
I have a table which holds totals for both 'group' and 'non-group' data. There is a column called 'Group Total' in the table which only holds data when the category is 'group'.
I have a measure which sums this column.
I include the measure in a line and clustered column chart. and I have 'category' as a slicer. So, when no category is selected, the line is there. When 'non group' is selected from the slicer, the line disappears, and when 'group' is selected, the line does not change.
What I want, is for the line to disappear UNTIL 'group' is selected from the slicer. And remain disappeared if anything BUT 'group' is selected.