I'm having (what I think is) the same issue-- how to suppress an entire matrix row when there is a particular value. Visibility is not a property when you click on the row, so I go to each cell in the row and set =Iif(ReportItems("cell name").Value ="whatevervalue)",True,False)
The result is a gap in the rows (the entire row is blank, but not collapsed).
If anyone has an idea, please help!