python singular matrix_奇异矩阵 – Python

下面的代码显示了矩阵的奇点问题,因为我在Pycharm中工作了

raise LinAlgError("Singular matrix")

numpy.linalg.linalg.LinAlgError: Singular matrix

我想问题是K但我无法理解究竟是怎么回事：

from numpy import zeros

from numpy.linalg import linalg

import math

def getA(kappa):

matrix = zeros((n, n), float)

for i in range(n):

for j in range(n):

matrix[i][j] = 2*math.cos((2*math.pi/n)*(abs(j-i))*kappa)

return matrix

def getF(csi, a):

csiInv = linalg.inv(csi)

valueF = csiInv * a * csiInv * a

traceF = valueF.trace()

return 0.5 * traceF

def getG(csi, f, a):

csiInv = linalg.inv(csi)

valueG = (csiInv * a * csiInv) / (2 * f)

return valueG

def getE(g, k):

KInv = linalg.inv(k)

Ktrans = linalg.transpose(k)

KtransInv = linalg.inv(Ktrans)