Hi Sindhu,
Follow these steps to create different partitions for each donut chart:
1. Now Create 2 calculated fields like this.
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2. Select the measure and aggregation of that measure to show the donut chart.
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3. Drag the measure names from column shelf to color shelf and measure values from row shelf to angle shelf.
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4. Now drag and drop the field in the row shelf.(make it attribute not sum(1) ) and add category(partition field) in the column shelf.
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5. Now remove all measures from any shelves for 2nd row.
6. Now make dual axis in row shelf.
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7. Now change the size in ATTR(1)(2) lower than before.
8. Change the color ATTR(1) (2) to white from color shelf.
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9.Now remove all headers,format and add required labels.
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10. A donut chart with each partition is created.
Hope this helps you.