How can I create nested pie/doughnuts chart?
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Abolfazl Chaman Motlagh on 8 Feb 2022
this might be useful:
but it's a lot simpler than charts in your source link. although the techniques to create all of those charts are similar to one used in above link.
but it seems you want a nested pie chart which from centeral layer to outer layer, every branch distribute into some sub-branches. if it is and above code doen't help, let me know. i will help you.