I've used the variable extension on Branch which allows for sliders to do this.
Basically you use a variable in your measure like:
If(Count(DISTINCT [Encounter CSN])>=$(vMin),Count(DISTINCT [Encounter CSN]))
The slider would then change the value of vMin; the visualization should also have the Include null values unchecked
Thanks David. I installed the qsVariable extension and added the slider. It seems there is a bug however with the extension when used with the September 2017 (Patch 1) version of Qlik Sense server: the extension has nowhere to enter the name of the variable, so not sure how to call it in the expression editor.
Does someone know what the default variable name is (when the slider is used)?
There is no default variable name; might try an older version of the extension or comment on git-hub to get it working with September 2017. Might be able to fix yourself as the source is included.
checking in June 2017, it works, but differently.
Create a variable first as the new extention uses a drop down