This is a very simple function to compute pair-wise Euclidean distances within a vector set, from between two vector sets. Although simple, it is very useful. Using loops will be too slow.
D=distanceMatrix(X), where X is N*d data, and D is N*N distance matrix.
Quan Wang (2021). Pair-wise Euclidean Distance Matrix (https://www.mathworks.com/matlabcentral/fileexchange/45968-pair-wise-euclidean-distance-matrix), MATLAB Central File Exchange. Retrieved .
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