eigen

代码说明：

  Chapoly 通过求矩阵特征多项式的根来求其特征值. pmethod幂法求矩阵的主特征值及主特征向量. rpmethod瑞利商加速幂法求对称矩阵的主特征值及主特征向量. spmethod收缩法求矩阵全部特征值. ipmethod 收缩法求矩阵全部特征值 dimethod位移逆幂法求矩阵离某个常数最近的特征值及其对应的特征向量 qrtzQR基本算法求矩阵全部特征值. hessqrtz海森伯格QR算法求矩阵全部特征值. rqrtz瑞利商位移QR算法求矩阵全部特征值. (Chapoly characteristic polynomial by the root of a matrix to find the eigenvalues. Pmethod power method of a matrix eigenvalue and the principal eigenvectors. Rpmethod Rayleigh quotient accelerated power method Symmetric matrix eigenvalue and the principal eigenvectors. Spmethod contraction Law of the value of all the characteristics of a matrix. ipmethod contraction method the value of all the characteristics of a matrix inverse power law dimethod displacement from a constant of a matrix eigenvalue and its corresponding nearest feature vectors qrtzQR all the characteristics of the basic algorithm the value of a matrix. hessqrtz Heisenberg QR algorithm is the value of all the characteristics of a matrix. rqrtz Rayleigh quotient shift QR algorithm is the value of all the characteristics of a matrix.)