Unique Count for Metric Card using String Column

[lorossi]

I am used to working with Power BI. In Power BI, when I place a string column on a card field it lets me display the number of rows (count), or the number of unique values (unique) or a few other options. I’m trying to achieve the same result in Workshop. I have a Metric Card but when I select my String Column/Variable I can’t seem to find a way for displaying an aggregation such as the count of values or the count of unique values.

[bkaplan]

If you have an object set, you should be able to create a numeric variable that is an object set aggregation. you can then select Exact Cardinality and the property of your choice to get the exact count.