计算偏相关系数和复相关系数

1. 根据4个要素的48个样本数据，计算得到的简单相关系数如下，试计算各级偏相关系数和复相关系数，并对其显著性进行检验。

1.	import math  
2.	import numpy as np  
3.	import pandas as pd  
4.	import pingouin as pg  
5.	  
6.	a=np.array([[1,0.9954,0.9994,0.9989],  
7.	           [0.9954,1,0.9926,0.9923],  
8.	           [0.9904,0.9926,1,0.9977],  
9.	           [0.9989,0.9923,0.9977,1]],dtype=float)  
10.	  
11.	r231=(a[1,2]-a[0,1]*a[0,2])/((1-a[0,1]**2)*(1-a[0,2]**2))**0.5  
12.	  
13.	r241=(a[1,3]-a[0,1]*a[0,3])/((1-a[0,1]**2)*(1-a[0,3]**2))**0.5  
14.	  
15.	r341=(a[2,3]-a[0,2]*a[0,3])/((1-a[0,2]**2)*(1-a[0,3