Consider the frequent closed itemset lattice shown in Figure 9.7. Assume that the item space is I = {A, B, C, D, E}. Answer the following questions (a) What is the frequency of CD? (b) Find all frequent itemsets and their frequency in the subset interval [B, ABD]. (c) Is ADE frequent? If yes, show its support. If not, why?

Consider the frequent closed itemset lattice shown in Figure 9.7. Assume that the item space is I = {A, B, C, D, E}. Answer the following questions (a) What is the frequency of CD? (b) Find all frequent itemsets and their frequency in the subset interval [B, ABD]. (c) Is ADE frequent? If yes, show its support. If not, why?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Consider the frequent closed itemset lattice shown in Figure 9.7. Assume that the item space is I = {A, B, C, D, E}. Answer the following questions

(a) What is the frequency of CD?

(b) Find all frequent itemsets and their frequency in the subset interval [B, ABD].

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