灰色关联分析法步骤（python代码实现）

标签：axis   dex   file   关联   exce   ali   处理   bsp   分析法   

import pandas as pd
import numpy as np
# x = pd.DataFrame([[2000,0.732,0.836,0.628,0.743], [2001,0.758,0.883,0.688,0.787], [2002,0.859,0.914,0.781,0.929],[2003,1.0125,1.0440,1.0237,0.9847],[2004,1.2356,1.1069,1.2833,1.2363],[2005,1.4013,1.2152,1.5405,1.3182]])
# x=pd.read_excel(‘D:\date\winequality\winequality-red1.xlsx‘)

csv_file = "D:\date\winequality\winequality-red1.csv"
csv_data = pd.read_csv(csv_file, low_memory=False) # 防止弹出警告
x= pd.DataFrame(csv_data)
x=x.iloc[:,1:].T

# 1、数据均值化处理
x_mean=x.mean(axis=1)
for i in range(x.index.size):
x.iloc[i,:] = x.iloc[i,:]/x_mean[i]

# x.iloc[i,:] = x.iloc[i,:]/x_mean[i]  #i或者i+1不太明晰

# 2、提取参考队列和比较队列
ck=x.iloc[0,:]
cp=x.iloc[1:,:]

# 比较队列与参考队列相减
t=pd.DataFrame()
for j in range(cp.index.size):
temp=pd.Series(cp.iloc[j,:]-ck)
t=t.append(temp,ignore_index=True)

#求最大差和最小差
mmax=t.abs().max().max()
mmin=t.abs().min().min()
rho=0.5

#3、求关联系数
ksi=((mmin+rho*mmax)/(abs(t)+rho*mmax))

#4、求关联度
r=ksi.sum(axis=1)/ksi.columns.size

#5、关联度排序，得到结果r3>r2>r1
result=r.sort_values(ascending=False)
print(result)

灰色关联分析法步骤（python代码实现）

标签：axis   dex   file   关联   exce   ali   处理   bsp   分析法   

原文地址：https://www.cnblogs.com/betterwill/p/11631734.html