A similarity matrix is a type of matrix that shows the similarities between two variables of data. A stronger similarity implies a greater value of measure. The picture exhibits a similarity matrix from the SRI Malware Cluster Laboratory. The level of similarity is shown using colors. The more similar results are identified by the highest number which in this example is 1.0. The number one is pictured on the graph using the color red. The areas of least similarity are colored blue.
http://cgi.mtc.sri.com/Cluster-Lab/
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