Cloudera Docs

Customizing output parameters

In Cloudera Data Visualization, application controls can use custom output parameters. You can use custom output parameters for application controls. This allows you to apply a filter from one dataset to control the visual presentation of another dataset.

Often, the field names between the source (driver) and target datasets do not match. You can resolve this by mapping the filter’s value to the correct field in the target dataset.

The following steps show you how to configure a filter based on the US State Populations Over Time dataset to control a visual based on the US County Population dataset.

  1. Open an existing dashboard in Edit mode or create a new one.
  2. Ensure that includes visuals from both datasets. If not, click the Visuals tab on the left navigation and add the required visuals.
  3. Click the Filters tab and select the US State Populations Over Time dataset.
  4. Under Dimensions, click the state field to add it as a filter.
  5. Hover over the added filter until controls appear in the top right corner, then click .

    The Settings modal window opens on the Values tab.

  6. Configure the following values:
    • Title: Set to States.
    • Output Parameter: Set to stname.
  7. Click APPLY.
  8. In the state filter, click Select and chose the following:
    • AK
    • AL
    • AR
  9. In the top right corner of the application, hover over to review the current filter parameters.

    This reports the current filtering parameters. The output parameter is correctly named stname, and the filtering conditions applied earlier are displayed.

    If the Emit distinct parameters for each item selected option is selected on the Display Settings tab, the filter reports each selection as distinct key/value pairs. By default, the label for each key is derived from its value. However, if labels are specified (for example, when using optional parameters), they will be displayed instead.