Category axis that represents the x-axis when its location is either on the bottom or the top.
When the axis location is left or right, then the category axis represents the y-axis. The category
axis requires a set of categories that will form the axis. Generally, these categories should
be the name of the series used to represent each category.
Category axis that represents the x-axis when its location is either on the bottom or the top. When the axis location is left or right, then the category axis represents the y-axis. The category axis requires a set of categories that will form the axis. Generally, these categories should be the name of the series used to represent each category.