如下所示：
from numpy import *
import numpy as np
import matplotlib.pyplot as plt
plt.close()
fig=plt.figure()
plt.grid(True)
plt.axis([0,10,0,8])
#列出数据
point=[[1,2],[2,3],[3,6],[4,7],[6,5],[7,3],[8,2]]
plt.xlabel(X)
plt.ylabel(Y)
#用于求出矩阵中各点的值
XSum = 0.0
X2Sum = 0.0
X3Sum = 0.0
X4Sum = 0.0
ISum = 0.
