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Comment by windsignaling

I'm surprised no one else has commented that a few of the conceptual comments in this article are a bit odd or just wrong.

> The final accuracy is 90% because 1 of the 10 observations is on the incorrect side of the decision boundary.

Who is using K-means for classification? If you have labels, then a supervised algorithm seems like a more appropriate choice.

> K-means clustering is a recursive algorithm

It is?

> If we know that the distributions are Gaussian, which is very frequently the case in machine learning

It is?

> we can employ a more powerful algorithm: Expectation Maximization (EM)

K-means is already an instance of the EM algorithm.

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