Sort coordinates into groups depending on their location

Hello everyone,

attached you will find an image of an aerofoil rib. The blue points represent areas of maximum stress. I have the coordinates of those areas in one array. I am looking for a general way to sort those coordinates in different arrays for each area. So in this case i want to have 5 different sets of coordinates.

Thanks in advance, Markus.

[KSSV]

Have a look on kmeans.

[Markus Kucera]

Thanks KSSV thats what i needed.