In this chapter, we created a pie chart that animates when you remove sections from it. You learned how to generate paths from data, so that you can get different parts of the pie without having to specify the drawing commands directly in the path elements. You also learned how to use animation to make visualizations look more professional. Finally, you learned how to remove sections of the pie and have the other path elements redraw themselves, so that the result will be a full pie.
In the next chapter, we will use D3 to create a graph that visualizes the relationships between various nodes of data.
