相關性分析 散點圖

import pandas as pd
df2=pd.read_excel('./data/data2.xlsx',index_col='產品編碼')
df2.head()
x=df2['供應商進貨價']
y=df2['銷售價']
from pylab import mpl
mpl.rcParams['font.sans-serif']=['FangSong']
#散點圖
import matplotlib.pyplot as plt

fig,ax=plt.subplots()
ax.scatter(x,y,color='green')
ax.set(xlabel='供應商進貨價',ylabel='銷售價',title='銷售情況分析')
plt.show()

#散點矩陣
from pandas.plotting import scatter_matrix
scatter_matrix(df2,figsize=(10,10),marker='o',alpha=0.5)
plt.show()

#相關系數
df2.corr()
df2['銷售價'].corr(df2['供應商進貨價'])