Use the online music data set from the previous exercise to perform association rule analysis. Make sure to read the data file into R using the readtransactions function first. 

a. Explore the data using an item frequency plot and a frequency table. What is the most frequently downloaded song? 

b. Generate association rules with a minimum support of 0.1 and minimum confidence of 0.5. Sort the rules by lift ratio. Report and interpret the lift ratio of the top rule. 

Data from Exercises 55

An online music streaming service wants to find out which popular Beatles songs are frequently downloaded together by its users. The service collects the download logs for 100 users over the past month, where the download logs show which songs were downloaded during the same session. A portion of the data is shown in the accompanying table.

User 1 User 2 Yesterday, All You Need Is Love... Here Comes the Sun Hey Jude, Come Together... Here Comes the Sun 1 I User 100 Hey Jude, Come Together... Here Comes the Sun