HN user
it all starts with thinking a green, bizarre little troll could actually build a profitable company that is easily repeatable by anyone with 2 years of university
k nearest neighbours suffers from over clustering problems and central nodes which have too many edges. at least tell people what causes the algorithm to fail in real life scenarios.
learn visualization but not the underlying statistical common sense that allows you to produce meaningful data. yah right... R will do everything for you... no need to worry about the real work...