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Where is the code for DistanceMatrix?
DistanceMatrix is defined in the HierarchicalClustering package and in the HierarchicalClustering` context. But if I open in the HierarchicalClustering .m file D:\Program Files\Wolfram Research\Mathematica\7.0\AddOns\Packages\HierarchicalClustering directory, I find If[ Not@ValueQ[DistanceMatrix::usage], DistanceMatrix::usage = "DistanceMatrix[list] computes the \ symmetric matrix of distance or dissimilarity coefficients between \ the elements of list."] If I do Needs["HierarchicalClustering`"] ?DistanceMatrix then I get DistanceMatrix [ list ] gives a matrix of distances or dissimilarities between the elements of list . >> which is not what the usage message says Then I try to find the code for the function DistanceMatrix, but I do not find it in this file. Where is it? Is it hidden in the Kernel? If it is in the Kernel, why is it not available without loading HierarchicalClustering? Ingolf Dahl Sweden e-mail: ingolf.dahl at telia.com