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Practical Predictive Analytics by Ralph Winters

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Analyzing the input file

After reading in the file, the nrow() function shows that the transaction file contains 541909 rows:

nrow(OnlineRetail)

This is the following output:

> [1] 541909 

We can use our handy View() function to peruse the contents. Alternatively, you can use the kable() function from the knitr library to display a simple tabular display of the dataframe in the console, as indicated later.

Look at the first few records. The kable() function will attempt to fit a simple table in the space providing, and will also truncate any long strings:

kable(head(OnlineRetail)) 

We can still see the last column is truncated (United Kingdom), but all of the columns fit without wrapping to the next line:

Using an R Notebook with the ...

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