Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "We used the e1071 package to run SVM."

A block of code is set as follows:

vector_ratings <- factor(vector_ratings)qplot(vector_ratings) + ggtitle("Distribution of the ratings")
exten => i,1,Voicemail(s0)

New terms and important words are shown in bold.

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.

Get Building a Recommendation System with R now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.