Never heard of it.
Does it work like any other set?
As of 8.2 (I think) there are two kinds of Sets in Tableau:
- Computed Sets that are created by selecting a dimension in the Dimensions window->right+click->Create->Set.. These can use Top & Conditional filters as well as select specific values, and edit the set at a later time.
- Constant Sets that used to be called Manual Sets and in the Describe window have a third name of Enumerated Sets. These are manually created in a view by selecting a group of marks and then either creating a set from the tooltip or from the right-click context menu. These Constant Sets are based on the dimension(s) used to make the marks and all we can do is remove dimensions or specific values from the set.
Back before Tableau v8.2 Combined Fields were called a Combined Set and appeared in the Sets window, and also way back when (not sure when it ended) the results of filter actions (which are effectively a kind of combined field) would also show up in the Sets window.
Thanks Joe for looking into this.
Thanks Jonathan for sharing your knowledge. From your comment - 'These Constant Sets are based on the dimension(s) used to make the marks and all we can do is remove dimensions or specific values from the set.', this is what I am doing, manually select values and then use it in the filter to show in/out.