<span style="font-family: Arial, Helvetica, sans-serif;" import numpy as np</span> 

> import matplotlib.pyplot as plt
> x=np.arange(-5,5,0.01)
> y=x**3
> plt.axis([-6,6,-10,10])
[-6, 6, -10, 10]
> plt.plot(x,y)
[<matplotlib.lines.Line2D object at 0x03C642B0>]
> plt.show()

xlim((xmin,max)) #设置坐标轴的最大最小区间 
xlim(xmin,xmax) #设置坐标轴的最大最小区间 
ylim((ymin,ymax))#设置坐标轴的最大最小区间 
ylim(ymin,ymax) #设置坐标轴的最大最小区间 

> import numpy as np 
> import matplotlib.pyplot as plt 
> x=np.arange(-5,5,0.01) 
> y=x**3 
> plt.xlim(-6,6) 
(-6, 6) 
> plt.ylim(-500,500) 
(-500, 500) 
> plt.plot(x,y) 
[<matplotlib.lines.Line2D object at 0x0381A4B0>] 
> plt.show()