Views for Mashups and Mashables : Built-in Presto Views : Doughnut Chart : Configure This View
Configure This View
Choose the Doughnut Chart view and:
1. If needed, change the Select Dataset field to find the repeating items that contain the fields you want to chart. This must be the parent node to the fields you want to use and it must be a repeating node.
2. Drag the title of the column that contains the labels for the doughnut slices and drop this in the Label field.
Tip:  
For better visual results, the total number of doughnut slices should be less than 75.
3. Drag the title of the column that contains numeric data into the Value field.
Tip:  
For best results, the values for slices should be at least 3% or larger of the total.
4. Optionally, drag the title of the column with text values to use as the Tooltip when the mouse passes over each doughnut slice. If you omit this, tooltips simply do not appear in the chart.
5. Optionally, change the Chart Visualization property to set this as two dimensional (2D) or three dimensional (3D).
6. If the values of the Label field are not unique, change the Aggregation function from None to the function you want to use to calculate the value to use for each slice.
7. Click Next and set basic options for the chart in the Customize View step:
*Set a Caption or Subcaption for the chart or gauge.
*If needed, add a prefix or suffix for all numeric labels for this gauge or chart.
Common examples might be $ as the prefix or % as suffix.
You can also Include Dynamic Content in Captions and Labels if desired.
8. If needed, click Switch to advanced mode to set other visual properties for the chart. See Advanced Configuration Properties for details.
9. Preview the chart at any time.
10. Once you are satisfied, save the view:
a. Click Finish.
b. Give the view a name, and optional description.
c. Click Save.
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