A calculated field that you create exists only in your data source in Tableau Public; it does not exist in the file that you originally queried, which is the reason behind why you are creating it in the first place. In the following examples, we will be creating calculated fields in a data set of floods. The fields that we create will show up in the Dimensions or Measures pane in the Data window in Tableau Public depending on their type of field, with the equals sign (=) next to them.
In Tableau Public, there are several ways to create a calculated field. The following steps will guide you:
From the Analysis menu, select Create Calculated Field.
Click on the Context menu of the data source and then select Create Calculated Field.
Right-click on a field in the Dimensions or Measure pane of a data source. Select Create and then choose Calculated Field.
Tableau Public has a new calculated field dialog box in version 9.x, which is a significant improvement over the previous...