Compute eigenvalues and, optionally, eigenvectors of a real symmetric matrix by seraching over ranges of values or ranges of indices.
eigen2(x, range = c(-Inf, Inf), range.type = "interval",
only.values = FALSE, abstol = 1e-08, orfac = 0.001)symmetric, numeric ddmatrix.
A set of interval endpoints, i.e. a numeric pair. Controls the set of values over which the eigenvalue search occurs.
Controls whether interval range refers to a set of
possible values for the eigenvalues, or a set of indices for the
eigenvalues. Options are "interval" and "index".
logical. Determines whether only the eigenvalues should be computed, or if the eigenvectors should as well.
The absolute error tolerance for the eigenvalues.
Specifies which eigenvectors should be reorthogonalized. Eigenvectors that correspond to eigenvalues which are within tol=orfac*norm(A)of each other are to be reorthogonalized.
Returns a distributed matrix.
This new method computes selected eigenvalues and, optionally, eigenvectors of a real symmetric matrix. Eigenvalues and eigenvectors can be selected by specifying either a range of values or a range of indices for the desired eigenvalues.