>>>import  matplotlib.pyplot as plt

>>>year = [1950,1970,1990,2010]#作为x轴

>>>pop = [2.519,3.692,5.263,6.972]]#作为Y轴

>>>plt.plot(year,pop)#直线图
[<matplotlib.lines.Line2D object at 0x000001A6BA9874E0>]
>>>plt.show()#显示直线图
>>>plt.scatter(year,pop)#散点图
<matplotlib.collections.PathCollection object at 0x000001A6BA941BE0>
>>>plt.show()#显示散点图

>>>import  matplotlib.pyplot as plt

>>> values = [0,0.6,1.4,1.6,2.2,2.5,2.6,3.2,3.5,3.9,4.2,6]

>>> plt.hist(values,bins=3)

(array([ 4.,  6.,  2.]), array([ 0.,  2.,  4.,  6.]), <a list of 3 Patch objects>)

>>> plt.show()