In this chapter, you learned how to create various types of data visualizations and how to work with graph functions and graph objects efficiently. Apart from the basic graph types, you learned how to create interactive graphs and maps and how to create our own custom types of graphs. The fundamentals shown in this chapter allow you to create high-quality visualizations using important and popular packages such as ggplot2 and leaflet.
In the next chapter, Chapter 6, Understanding Reviews with Text Analysis, we will analyze the text data we have from client messages as well as data we retrieve from Twitter in real-time. We will show how to generate sentiment analysis given textual data, and we will prepare ourselves to put the graphs in this chapter together with the text analysis in the following chapter into automatic reports in Chapter 7, Developing Automatic Presentations...