Give the number of candidate pairs on the second pass

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Reference no: EM131212146

Imagine that there are 1100 items, of which 100 are "big" and 1000 are "little." A basket is formed by adding each big item with probability 1/10, and each little item with probability 1/100. Assume the number of baskets is large enough that each item set appears in a fraction of the baskets that equals its probability of being in any given basket. For example, every pair consisting of a big item and a little item appears in 1/1000 of the baskets. Let s be the support threshold, but expressed as a fraction of the total number of baskets rather than as an absolute number. Give, as a function of s ranging from 0 to 1, the number of frequent items on Pass 1 of the A-Priori Algorithm. Also, give the number of candidate pairs on the second pass.

Reference no: EM131212146

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