Parameters
This section covers Tableau’s parameters, including the different types of parameters, how to use them in calculated fields, how to use them to filter, and how to use them to customize reference lines.
Parameter Creation
Tableau’s parameters are essentially single-value variables that can be updated by the user to increase interactivity. An example of a parameter would be creating a percentage parameter that enables the user to select a value between 0% and 100%. The parameter could then be used in a calculated field to create a targeted percentage growth value for next year’s sales, based on the current year’s sales and a user-input percentage growth. This would then allow the end user to play with the parameter and see the impact of different percentage growth targets.
Parameters can be created using either the values of existing fields or user-defined values. To create a parameter from the values in an existing field, right-click the...