Assignment 2.1 Given a minimum support threshold of 1, please try to solve the following questions. a) Show the FP-Tree with the lexicographic ordering a, b, c, d, e, f for the following database of transactions. TransID 1 2 345 b) Show the FP-tree for the same database with the reverse lexicographic ordering TransID 1 GAWNI 2 3 4 Items a,b,c,d b, c, e, f a, d, e, f a, e, f b, d, f 5 Items d, c,b,a f,e,c,b f,e,d, a f,e,a f,d,b c) Why is the second FP-tree smaller, i.e. has fewer nodes?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
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Assignment 2.1
Given a minimum support threshold of 1, please try to solve the following questions.
a) Show the FP-Tree with the lexicographic ordering a, b, c, d, e, f for the
following database of transactions.
TransID
1
2
3
4
5
TransID
Items
a,b,c,d
b, c, e, f
a,d,e,f
b) Show the FP-tree for the same database with the reverse lexicographic ordering
1
2
3
4
5
a,e,f
b, d, f
Items
d, c,b,a
f,e,c,b
f,e,d, a
f,e,a
f,d,b
Why is the second FP-tree smaller, i.e. has fewer nodes?
Transcribed Image Text:Assignment 2.1 Given a minimum support threshold of 1, please try to solve the following questions. a) Show the FP-Tree with the lexicographic ordering a, b, c, d, e, f for the following database of transactions. TransID 1 2 3 4 5 TransID Items a,b,c,d b, c, e, f a,d,e,f b) Show the FP-tree for the same database with the reverse lexicographic ordering 1 2 3 4 5 a,e,f b, d, f Items d, c,b,a f,e,c,b f,e,d, a f,e,a f,d,b Why is the second FP-tree smaller, i.e. has fewer nodes?
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