#### xField

<description>**required** _string_</description>

The name of the data field corresponding to the graph in the x direction, usually the field corresponding to the horizontal coordinate axis. For example, to see how many people are in different classes, the class field is the corresponding xField.

#### yField

<description>**required** _string_</description>

The name of the data field corresponding to the graph in the y direction, usually the field corresponding to the vertical coordinate axis. For example, to see the number of students in different classes, the number field is the corresponding yField.
