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I can't understand the red box. what do does that 1 do before {c(I)=j} ? Also how does all the algorithms work? May someone explains the to steps more clearly by one example!

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1_{c^(i) = j} means if c^(i) is equal to j the value is 1 and zero otherwise.

In summary, k-means try to solve Voronoi cells for each mean point, and then update mean of members of a cell and update Voronoi cells again. This step is repeated until there is no change in members of the cells.

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  • $\begingroup$ Is mu(j) a vector? I am confused about I and j. what do counter these 2 letters? $\endgroup$
    – user3486308
    Dec 23, 2017 at 3:49
  • $\begingroup$ @user8663682 mu(j) is mean of members of the cluster j at each step, and c^(i) is index of the cluster which is assigned to the point of x_i. $\endgroup$
    – OmG
    Dec 23, 2017 at 10:51

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