K-means: see the initial centroids

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Phu Lai
Phu Lai 2016-12-2
评论： Massimo Zanetti 2016-12-6
Hi everyone,
Is it possible to see the randomly selected initial centroids when using the built-in kmeans function? I want to keep track of the centroids in each iteration.
Thanks.

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Massimo Zanetti
Massimo Zanetti 2016-12-2
Yes it is possible.
kmeans allows you to set option parameters via the statset function. In the help page kmeans there some examples on how using stateset.
Set the parameter 'OutputFcn' as shown in this tutorial, for displaying iteration results in iterative solvers: https://it.mathworks.com/help/matlab/math/output-functions.html
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Phu Lai
Phu Lai 2016-12-6
Thank you. I ended up following that approach. Also, do you know how to see the first initial centroids? (Let's say, C{0} in your example)
Massimo Zanetti
Massimo Zanetti 2016-12-6
Nope.. I have tried setting 'MaxIter'=0, but it seems it is the same as setting 'MaxIter'=1. The kmeans function is a black box :(

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