You can do this by creating another calculated field similar to the following:
if [RtlWSRatio]>=.9 and RtlWSRatio<=1.1 then 'Hide' else 'Show' end
Then, place this on the filter shelf. Hope this helps!
This sounds like what I am after...however, when I do this I am not able to add this new field to the Filter Shelf. I thought maybe it was because I was using a map to view where these "trouble" dealers were, but even on a blank new sheet I can't add that field to the filter shelf.
On a side note I AM able to add it to the columns shelf and then I can just hide teh "Hide" column, but that seems kind of like a hokie work around.
I had a feeling you might not be able to do this, but I wasn't sure if your calculation RtlWSRatio was aggregated or not. Since it is, Tableau cannot filter on aggregated strings. There is a way around this however, by changing the calculation to look like the following:
if [RtlWSRatio]>=.9 and RtlWSRatio<=1.1 then 1 else 0 end
Place this on the Level of Detail shelf. Then, right click on it and select Continuous. Right click on it again and select Filter. Finally, filter it to 1 if you don't want to show it.
That works well enough. Thank you very much for the help!