Category scales

Typical bar and line charts use a category scale for the x axis, and a numeric scale for the y axis. Multiple datasets reuse the same category data. In these charts, the values used for the category axis are obtained from the labels property of the data object. If a dataset has a labels property, its x axis will automatically be defined as type:category.

Configuring the axes

Category scales share the same axis configuration as numeric charts, but support some additional properties in the axis and axis.ticks objects. The axis object has one additional property that can be used to override the data object labels for an axis:

Property	Value	Description
labels	Array of String	An array of labels to display. Overrides any other definition for labels, including data object properties: labels, xLabels, or yLabels.

Additional axis configuration for category scales

The following code fragment shows category labels defined in three different properties. Since the single x axis contains a labels...