Adding Dependent Filters in Platform Analytics Dashboard

[vidhya_mouli]

How can I create a filter whose value is based on an other filter. I want Subcategory to be based on Category for Incident table. 

I already saw this video, but this will not help because the categories and subcategories are string field and not choice field.

[jeffrubinoff]

You can filter only by Choice or Reference (Selection filters), Boolean, or Date, as per the documentation.
Selection filters also support String fields beginning in Australia.