New in Wolfram Mathematica 6: Exploratory Data Analysis  previous | next 
Immediately Perform Cluster Analysis
Mathematica 6 adds general cluster analysis functionality, for data in any number of dimensions.
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ListPlot[FindClusters[Accumulate[RandomReal[{-1, 1}, {2000, 2}]], 4], 

 AspectRatio -> Automatic]
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