Practical Predictive Analytics

Method two – Creating a physical transactions file

Now that you know how to run association rules using the coerce to dataframe method, we will now illustrate the write to file method:

• In the write to file method, each item is written to a separate line, along with the identifying key, which in our case is the InvoiceId

• The advantage to the write to file method is that very large data files can be accumulated separately, and then combined together if needed

• You can use the file.show function to display the contents of the file that will be input to the association rules algorithm:

setwd("C:/PracticalPredictiveAnalytics/Data")load("OnlineRetail.full.Rda")OnlineRetail <- OnlineRetail[1:100,]nrow(OnlineRetail)> [1] 268034 head(OnlineRetail) ...