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[INDEX, DIST] = <a href="vl_kdtreequery.html">VL_KDTREEQUERY</a>(KDTREE, X, Y) computes the nearest
column of X to each column of Y (in Euclidean distance). KDTREE is
a forest of kd-trees build by <a href="vl_kdtreebuild.html">VL_KDTREEBUILD</a>(). X is a
NUMDIMENSIONS x NUMDATA data matrix of class SINGLE or DOUBLE with
the data indexed by the kd-trees (it m