相关性分析 散点图

import pandas as pd
df2=pd.read_excel(\'./data/data2.xlsx\',index_col=\'产品编码\')
df2.head()
x=df2[\'供应商进货价\']
y=df2[\'销售价\']
from pylab import mpl
mpl.rcParams[\'font.sans-serif\']=[\'FangSong\']
#散点图
import matplotlib.pyplot as plt

fig,ax=plt.subplots()
ax.scatter(x,y,color=\'green\')
ax.set(xlabel=\'供应商进货价\',ylabel=\'销售价\',title=\'销售情况分析\')
plt.show()

#散点矩阵
from pandas.plotting import scatter_matrix
scatter_matrix(df2,figsize=(10,10),marker=\'o\',alpha=0.5)
plt.show()

#相关系数
df2.corr()
df2[\'销售价\'].corr(df2[\'供应商进货价\'])