![]() Symmetrical proximities mean that the order of the entities is not important, so the proximity of i and j is the same as the proximity of j and i for all pairs i,j. The links in the network will be undirected if the proximities are symmetrical for every pair of entities. For example, if the proximities are similarities, links will generally connect nodes of high similarity. In the Pathfinder network, the entities correspond to the nodes of the generated network, and the links in the network are determined by the patterns of proximities. The entities are often concepts of some sort, but they can be anything with a pattern of relationships. Proximities can be obtained from similarities, correlations, distances, conditional probabilities, or any other measure of the relationships among entities. Pathfinder networks are derived from proximities for pairs of entities. ![]()
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