So I have a dimension, lets call this eqv engine size. The eqv engine size has Null values (-) in the data set. I want to have a set analysis that will only allow it to show the data on let say for example car to show the - (null) value. So i will then create 3 different straight tables, one to display car,boat and bike with the help of the set analysis
However, your question seems a bit incomplete. What do you want the set analysis for. A measure? A measure cannot hide all rows if other measures have different set analyses. A calculated dimension? This merits more cereful design and explanations.