how do I draw the cluster boundaries in a scatter plot?

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zepp
zepp 2014-3-5
回答： Adam Cutbill 2014-3-18
I have a scatter plot of three clusters. How can I represent them by showing the cluster boundaries rather than using colours for the different clusters? I would like to draw circles (or ellipses) around each cluster. These clusters were created using a mixture model and I have also created the gmdistribution object of the model if that can be useful.
Thanks

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Image Analyst
Image Analyst 2014-3-7

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Adam Cutbill
Adam Cutbill 2014-3-18
You can also use the convex hull operation if you're more concerned with capturing the boundary than making sure it is a ellipse.(<http://www.mathworks.com/help/matlab/math/convex-hulls.html>)

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