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Computers and Technology, 17.07.2020 01:01 kaperry
Assume you are given the following collection of twelve baskets, each of which containing three of the six items 1 through 6:
{1, 2, 3} {2, 3, 4} {3, 4, 5} {4, 5, 6}
{1, 3, 5} {2, 4, 6} {1, 3, 4} {2, 4, 5}
{3, 5, 6} {1, 2, 4} {2, 3, 5} {3, 4, 6}
Suppose the support threshold is 4. On the first pass of the PCY Algorithm we use a hash table with 11 buckets, and the set {i, j} is hashed to bucket i×j mod 11.
a) By any method, compute the support for each item and each pair of items.
b) Which pairs hash to which buckets?
c) Which buckets are frequent?
d) Which pairs are counted on the second pass of the PCY Algorithm?
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Answers: 3
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