this module contains a function to perform fast distance computation on arrays
Author : Bertrand Thirion, 2008-2011
Considering the rows of X (and Y=X) as vectors, compute the distance matrix between each pair of vectors
Parameters: | X, array of shape (n1,p) : Y=None, array of shape (n2,p) :
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Returns: | ED, array fo shape(n1, n2) with all the pairwise distance : |