# coding=utf-8
import numpy as np
import math
a=[[-0.009294274383709979, -0.001500055359787263, 0.02987848163723865], [-0.006139682710816608, 0.006679524696907926, 0.029116826763785613], [-0.0028559198425981524, 0.006263737416112432, 0.027737975785770433], [-0.006497398544863101, 0.00418531980358439, 0.03169096115885141], [-0.003263791729688482, 0.003995452413121362, 0.030845015380840935], [-0.010962488061435741, 0.0018848003627957987, 0.027681197731294925], [-0.009376633645915976, 0.0015183891309179895, 0.031123561973671447], [0.001964577788415826, 0.0013006935926476307, 0.026843008400200197], [-0.006455051887208647, 0.001196870412971547, 0.03104345777816099], [-0.0005278654357248199, 0.0010906656095050489, 0.02949497914507665], [-0.003433176307492873, 0.0010879466996620518, 0.030919085034886388], [-0.011005165910767934, -0.0011164933968497543, 0.026872087757978086], [-0.006626696541428535, -0.0017629187762603254, 0.031127717643416285], [-0.003521760926532071, -0.0019149129986465883, 0.03060735943241905], [-0.0005710092222442537, -0.0019009795129174556, 0.028524436991262992], [0.0018830066322597697, -0.0017245181964665927, 0.025751989962064226], [-0.006752843296905347, -0.0044948975632372575, 0.029982008044495915], [-0.0034391243801637256, -0.004490305154020002, 0.028709564853001183], [-0.006437089568035455, -0.00638614881870415, 0.026300484646981488], [-0.0031812511384896576, -0.006424823191943885, 0.02543081516363608]]










X=[]
Y=[]
Z=[]
for i in range(20):
  x=a[i][0]
  y=a[i][1]
  z=a[i][2]
  X.append(x)
  Y.append(y)
  Z.append(z)
x1=sum(X)/20
y1=sum(Y)/20
z1=sum(Z)/20
print("零点偏移量为：") 
print(x1,y1,z1)