提问人:Siddharth Pandalai 提问时间:4/25/2020 更新时间:4/27/2022 访问量:394
ECLAT算法,用于查找最大和闭合频繁集
ECLAT Algorithm to find maximal and closed frequent sets
问:
Transaction ID Items
1 {A, C, D}
2 {B, C, E}
3 {A, B, C, E}
4 {B, E}
5 {A, B, C, E}
Minimum support count is 3. Determine maximal frequent and closed frequent itemset using ECLAT Algorithm.
有人可以解释一下如何获得最大频繁和封闭频繁项集吗?我一直在尝试在网上寻找资源,但一直无法找到令人满意的解释来解决这个问题。 最多,我已经能够解决直到最终的支持表,但除此之外,一直无法找到找到所需集合的方法。
答:
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Siddharth Pandalai
4/25/2020
#1
Creating Support Tables:
Minsup>=3
For k=1,
Sr. No Itemset Support
1 {A} 3
2 {B} 4
3 {C} 4
4 {D} 1
5 {E} 4
For k=2,
6 {A, B} 2
7 {A, C} 3
8 {A, E} 2
9 {B, C} 3
10 {B, E} 4
11 {C, E} 3
For k=3,
12 {A, B, C} 2
13 {A, B, E} 2
14 {A, C, E} 2
15 {B, C, E} 3
For k=4,
16 {A, B, C, E} 1
Since Minsup>=3,
We eliminate Itemsets 4, 6, 8, 12, 13, 14, 16 as their support is <3.
Hence,
Maximal Frequent Itemset: {B, C, E}
Closed Frequent Itemset: {A, C} & {B, C, E}
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