matplotlib.pyplot.axis()与matplotlib.pyplot.axes()结构及用法

• matplotlib.pyplot.axis() 官方文档

matplotlib.pyplot.axis(*v, **kwargs)

获得或设定axis内容的便利方法。

常用参数：

xmin, ymin, xmax, ymax : float, optional

The axis limits to be set. Either none or all of the limits must be given.

option : str

Possible values:

Value	Description
‘on’	Turn on axis lines and labels.
‘off’	Turn off axis lines and labels.
‘equal’	Set equal scaling (i.e., make circles circular) by changing axis limits.
‘scaled’	Set equal scaling (i.e.,