Practical Predictive Analytics

Format of the groceries transaction Files

The Groceries is a transaction class object, not a dataframe. This R object represents transaction data used for mining item sets or rules. Logically, it is organized as a list of grocery receipts along with the items that were purchased together. Every individual line is referred to as a transaction and every column of the transaction represents a specific item purchased.

For example, here are three transactions consisting of a varying number of purchases:

Transaction 1	Milk	Cereal
Transaction 2	Beef
Transaction 3	Butter	Sugar	Cream

 

However, a transaction object is not physically organized in strict database table format. It is in a special R object format known as ...