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Probability table or potential.
Consider p(R,W) to get p(R) we can 'sum out' W: p(R) = SumW(p(R,S)) This is called margiinalization of W, Notice that marginalization is equivalent to aggregation on column P: SumW(p(R,W) = rGsum(P)Tr,w (relational algebra) ofm in SQL: SELECT R, SUM(P) form Tr,w GROUP BY R 5:40 Tags: connect Edit this page |
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