Nearest Neighbor Graph Connections![]() The two graphs at the top, from the original Demonstration, show an arrangement of points and connections for the number of neighbors specified and one number beyond. The bottom-left plot shows ranked plots over the range of neighbors chosen (up to the maximum). That is, for each value for nearest or next neighbors, the ranked graph shows how well the points are connected. As the number of specified neighbors increases, the number of realized connections increases as well. And there is a skew to the result, as a few dots have many connections and many dots are in the tail with fewer connections. Connections are concentrated as a purely probabilistic phenomenon. The contour plot at the lower right shows the statistics for the number of connections, a PDF in terms of counting the occurrences of different values for resulting connections. It uses the same results as in the ranked plot, but counts the occurrence of each value of connection. A ridge appears, representing the maximum count of connections for each nearest neighbor number. This ridge is more diffuse for larger values of connections as there is statistical variation in the clustering, with the larger reaches from successively farther neighbor connections. Finally both plots reach a maximum plateau at connections. When enough neighbors are connected the points become connected to every other point.![]() "Nearest Neighbor Graph Connections" from The Wolfram Demonstrations Project http://demonstrations.wolfram.com/NearestNeighborGraphConnections/ Contributed by: Jim Gerdy |
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