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python Programming Glossary: xtocIs it possible to specify your own distance function using Scikits.Learn K-Means Clustering? http://stackoverflow.com/questions/5529625/is-it-possible-to-specify-your-own-distance-function-using-scikits-learn-k-means 1 D cdist_sparse X centres metric metric p p # X x centres xtoc D.argmin axis 1 # X nearest centre distances D allx xtoc avdist.. xtoc D.argmin axis 1 # X nearest centre distances D allx xtoc avdist distances.mean # median if verbose 2 print kmeans av.. prevdist avdist for jc in range k # 1 pass in C c np.where xtoc jc 0 if len c 0 centres jc X c .mean axis 0 if verbose print..
Calculating the percentage of variance measure for k-means? http://stackoverflow.com/questions/6645895/calculating-the-percentage-of-variance-measure-for-k-means should be added to Denis's K means implementation centres xtoc dist kmeanssample points 2 nsample 2 delta kmdelta maxiter kmiter.. kmiter metric metric verbose 0 print Unique clusters set xtoc print cluster_vars for cluster in set xtoc print Cluster cluster.. clusters set xtoc print cluster_vars for cluster in set xtoc print Cluster cluster truthcondition x cluster for x in xtoc..
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