R Programming By Example

Scatter plots with joint and marginal distributions

We have seen how to create scatter plots with ggplot() in previous chapters. Therefore, in this section, we will only focus on the parts that we have not seen before. Our objective is to create scatter plots that not only show the scatter plot, but extend it by showing the marginal distributions on both axes. These are called marginal plots and are useful for understanding how data is jointly (two variables) as well as marginally (one variable) distributed.