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Topic:
Question: Centroid given a distance metric
Replies:
14
Last Post:
Feb 12, 2013 1:04 PM



quasi
Posts:
12,067
Registered:
7/15/05


Re: Question: Centroid given a distance metric
Posted:
Feb 11, 2013 12:50 PM


Andrey Savov wrote: >Andrey Savov wrote: >> >> Was wondering if you guys can point me in the right direction. >> >> Are there any known/studied methods to calculate a centroid >>(geometric center) of finite set of points in ndimensional >>real Euclidean space by only knowing a distance metric >>f(x,y): R^n x R^n > R ? > >Should have been a bit more clear. I am looking to find the >point in R^ that minimizes the square of the given metric >between itself and the given points. For Euclidean distance >metric that point would be sum(x_i)/k.
Is the metric derived from a norm?
For a general metric on R^2, what is the significance of the sum of the squares of the distances to a given point? And what jusifies calling a point which minimizes that sum for a given finite set of points "the centroid" of that set?
quasi



