spectral_connectivity.transforms.tridi_inverse_iteration

tridi_inverse_iteration(d, e, w, x0=None, rtol=1e-08)

Perform an inverse iteration. This will find the eigenvector corresponding to the given eigenvalue in a symmetric tridiagonal system. ..note:: Copied from NiTime. :param d: main diagonal of the tridiagonal system :type d: array :param e: offdiagonal stored in e[:-1] :type e: array :param w: eigenvalue of the eigenvector :type w: float :param x0: initial point to start the iteration :type x0: array :param rtol: tolerance for the norm of the difference of iterates :type rtol: float

Returns:

e – The converged eigenvector

Return type:

array