In Tableau Cloud, Data Change Radar shows data that Tableau has detected to be outside of expected ranges, revealing changes you may want to explore further.
Note: Data Change Radar is being made available as a preview feature included as part of the 2022.3 release. When using this feature, you should proceed with caution until you have validated the insights surfaced by Data Change Radar are accurate. This topic includes information on how to use and interpret Data Change Radar. For information on how to control availability of Data Change Radar, see Disable or Enable Data Change Radar for a Site.
You cannot change or update the historical data that is displayed in Data Change Radar, but you can delete it. To delete the data, you can either turn off Data Change Radar by disabling it, or you can delete the workbook that contains the data from your Tableau site. The historical data collected by Data Change Radar will be deleted within 48 hours of the workbook being deleted, or the site setting being turned off. For more information, see Remove historical data from Data Change Radar.
How Data Change Radar determines expected ranges
In tracked views, Tableau captures the value of each visualized measure over time. For each visualized measure, up to 960 recent data points are captured, either at each extract refresh for a workbook, or once every four hours, whichever is less frequent. With this data, Tableau trains an internal model to predict expected ranges for your data.
Notable data changes are available from the Home page, Recommendations page, or the Data Guide pane in Tableau Cloud.
Note: Measures from a data source that don't appear in a view are not tracked to conserve system resources.
Which views are tracked?
In addition to permission to access a view, a few other requirements are necessary for Data Change Radar to show notable data changes to you.
Extracts are required for all data sources in the published workbook.
Row-level security cannot be present in the data source or view.
The view must be popular and in the top 1% most accessed on your site in the last 30 days.
See recommended views with notable data changes
Tableau automatically recommends views with notable data changes detected in the last 24 hours. To ensure that these data changes are relevant to you, Tableau recommends only views you have favorited or accessed in the last 30 days, or that the Tableau recommendations engine thinks are important.
- From the left pane of Tableau Cloud, click Home or Recommendations to see views with data changes that might interest you.
Here's how a recommended data change appears on the Home page:
- If the Data Change icon appears, hover over the view thumbnail to see a brief description. If the change interests you, click the thumbnail to open the view and automatically display the notable change in the Data Guide pane.
See notable data changes in the Data Guide
If notable data changes are available for a dashboard or view, you will see them listed under Notable Data Changes in the Data Guide.
- Click the Data Guide icon in the view toolbar to open it. You might need to click the plus sign to the right of Notable Data Changes label to see the list.
- Click the name of a change in the list to expand its description.
Explore data changes
- Click a thumbnail for a recommended view to open it. Or open the Data Guide pane to see if any Notable Data Changes are available for the dashboard or view.
- In the Data Guide pane, click the filter and select Latest to see changes from the last 24 hours, or All to see changes from the last 21 days.
- In the list of changes, hover over a change to see its corresponding mark highlighted in the view.
- Click a change in the list to see how the measure values have changed over time.
In the graph that appears, the amber area indicates the expected data range for up to the last 30 days.
Do any of the following:
- In the Zoom section, click 1D, 7D, or 14D to show data from the most recent 1, 7, or 14 day period. Or click Max to show data up to the last 21 days and 960 data points.
- Hover over the graph to see values captured at each data point.
- Below the graph, drag and resize the gray area to customize the displayed time range.
- To return to the complete list of changes, click the Back arrow at the top of the Data Guide pane.
Tip: If you accidentally close the Data Guide pane, to re-open it, click Data Guide in the view toolbar or return to the Home or Recommendations section of your site.