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A similarity matrix is a matrix of scores that represent the similarity between a number of data points. Similarity matrices are used to find data points found in clusters. Also, similarity matrices can be used to align sequences of DNA. Similarity matrices can be used to organize similarity between objects so that all the objects are compared with each other and can thus show the similarity within the table. The image shown above is an example of a similarity matrix where every individual is compared with the other from Charley to Ron on their baseball skill ratings.
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