c = centroid v = vector (c - v)^2 = c^2 - 2cv + v^2
On 04.11.2011 15:58, WangRamon wrote: > > > > > Hi All I'm reading the code of SquaredEuclideanDistanceMeasure, the > "distance(double centroidLengthSquare, Vector centroid, Vector v)" method > confused me a lot, i don't know why we choose this expression > "centroidLengthSquare - 2 * v.dot(centroid) + v.getLengthSquared()" to > calculate the distance? What is the best case to use this Measure? BTW, I > think it would be great if we can have a wiki or some detail user guide or > more comments in the source code to explain each distance measure > implementation, that will really help, thanks guys. Cheers Ramon >
