Controlling the Spine

What is the spine?

Spines are lines that connect the axis tick marks to one another. Spines also note the boundaries of the data area. They can be placed in any position we want. By default, they are the boundary of the entire axes. So, for an axes, we have four spines: top, bottom, left, and right.

In mathematics, we are used to putting the axes in the middle. In this lesson, we will learn how to move two spines into the middle, and how to make the other two invisible.