Re: k-Means questions

[Grant Ingersoll]

On Jun 25, 2009, at 10:17 PM, Ted Dunning wrote:

Rephrasing:

Option 1) pick a single (or three) random input vector as the initial
position of each centroid

Option 2) assign every input vector to some centroid at random and compute

the resulting centroids

Option (1) is like (2), but it only assigns k input vectors while option (2) assigns all input vectors to some cluster. Many people use (2), but (1)

generally works better for me.

Gotcha.  Option 1 was what I had in mind.