In this chapter, we have examined a number of possible ways to explore data visually. We have used the flexibility of R to produce samples programmatically to generate data on the fly, which we have used to illustrate how to use basic plots. We have examined some of the associations in the game of roulette and developed functions according to our analytical needs. We have also examined how to recode data, and use only a subset of data, and introduced the concept of multiple sampling.

The next chapter will deal with more advanced graphs using the lattice package. This comes in handy when dealing with several group memberships (for example, ethnicity and gender at once).