ClusterClassify

ClusterClassify[data] generates a ClassifierFunction[…] by partitioning data into clusters of similar elements.

ClusterClassify[data,n] generates a ClassifierFunction[…] with n clusters.

Examples

Create a classifier from clustered data:

data = {{1, 2}, {1.1, 1.9}, {5, 6}, {5.2, 5.8}};
cf = ClusterClassify[data, 2];
cf[{1, 2}]
(* 1 *)

Classify a new point:

cf[{5, 6}]
(* 2 *)

Please visit the official Wolfram Language Reference for more details.