Euclidean Distance

One can think of the independent variables (in a regression equation) as defining a multidimensional space in which each observation can be plotted. The Euclidean distance is the geometric distance in that multidimensional space. It is computed as:

distance(x,y) = {Si (xi - yi )2}1/2

Note that Euclidean (and squared Euclidean) distances are computed from raw data, and not from standardized data. For more information on Euclidean distances and other distance measures, see Distance Measures in the Joining (Tree Clustering) Overviews.