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user 60479
Measures of closeness between distributions, clusterings, data sets or other objects.
15
votes
Distance Metrics For Binary Vectors
Seems like you're looking for either the Jaccard distance or the Dice dissimilarity.
Jaccard distance:
$1 - \frac{|A \cap B|}{|A \cup B|}$
Dice dissimilarity:
$1 - \frac{2|A \cap B|}{|A| + |B|}$
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