Machine Learning with R Cookbook - Second Edition

How to do it...

Perform the following steps to analyze the association rules:

1. First, you need to load the Groceries dataset:

        > data(Groceries)  

2. You can then examine the summary of the Groceries dataset:

        > summary(Groceries)  

3. Next, you can use itemFrequencyPlot to examine the relative item frequency of itemsets:

        > itemFrequencyPlot(Groceries, support = 0.1, cex.names=0.8,        topN=5) 

The top five item frequency bar plot of groceries transactions

4. Use apriori to discover rules with support over 0.001 and confidence over 0.5:

        > rules = apriori(Groceries, parameter = list(supp = 0.001, conf = 0.5, target= "rules")) > summary(rules) Output ...