Plots with polar coordinates
In this section, we will have a look at a few plots that can be created using polar coordinates. We have already introduced this coordinate system in the previous chapter. Just remember that you should always use these coordinates with caution since the representation of data in circular form can generate very pronounced perceptual problems concerning the relative areas in the plot.
The most important plots that you can realize with these coordinates are the pie chart, the bullseye chart, and the coxcomb diagram. For our examples, we will use the movie dataset, which we created in previous chapters and the myMovieData dataset, and we will represent in these different plots the proportions of movies within each category.
A pie chart
A pie chart in ggplot2 corresponds to a stacked bar chart in polar coordinates. This means that to produce a pie chart, we will first create a bar chart with bars stacked one on top of the other, and then we will change the coordinate...
