Creating Visuals with Variable Dimensions

Open a new visual based on US County Population dataset.
Choose the bar chart visual type.
Populate the shelves of the visual:
- From Dimension, select and move stname field onto the X shelf.
- From Measures, select and move tot_pop field onto the Y shelf.
- On the Y shelf, select tot_pop field, chose the Aggregates menu, and change the aggregate from Sum to Average.
- On the Y shelf, select tot_pop field, chose the Order menu, and select Ascending.
- Click Refresh Visual.
On the X shelf, select stname field, and then select Enter/Edit Expression menu.
In the Enter/Edit Expression modal window,
- Change the text to the following expression: <<dim:[stname]>>.
- Click Validate Expression.
- After successful validation, click Save.
Click Refresh Visual.
Change the name of the visual to Average population by <<dim>>.

Note that in this case, to have a nice title in your application, you must add the <<dim>> parameter to the title of the visual; it is used by the filters you are defining next.
Click Save.