Tableau donut chart is a pie chart with a hole in its center. That donut like hole in the center is used to show some cumulative values related to the data in the donut chart.
We can create a donut chart by following some simple steps.
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To begin with, we create two aggregate measure fields.
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Then we select the mark type Pie for the first measure field of the two.
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Add a set of fields to the Color , Label and Angle cards.
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Select Circle as the mark type for the second measure.
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Change the color of the circle to white.
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Add a measure field that you want to show at the center of the donut chart to the Label card of second aggregate measure.
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Select Dual Axis option from the Rows column for the second aggregate measure.
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Reduce the size of the inner circle.
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Our donut chart is ready.