[postgis-users] loci of points

[Paul Ramsey]

Clustering rears its ugly head again...

http://en.wikipedia.org/wiki/Cluster_analysis

On 16-Oct-07, at 2:48 PM, Stephen Woodbridge wrote:

> Michael Welter wrote:
>> Is there an algorithm to divide a group of points into <n>  
>> distinct groups?
>
> A locus is a set of points satisfying a certain condition.
> So what are you conditions?
> There are a lot of ways an arbitrary grouping can be made from a  
> larger set. What should determine if any given point should belong  
> to group 1 or 2 or N?
>
> It is hard to solve a problem that is under defined, unless one  
> makes up arbitrary constraints to satisfy the problem.
>
> -Steve W.
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