eigen2: eigen2

In wrathematics/pbdDMAT: 'pbdR' Distributed Matrix Methods

eigen2

Description

Compute eigenvalues and, optionally, eigenvectors of a real symmetric matrix by seraching over ranges of values or ranges of indices.

Usage

eigen2(
  x,
  range = c(-Inf, Inf),
  range.type = "interval",
  only.values = FALSE,
  abstol = 1e-08,
  orfac = 0.001
)

Arguments

x	symmetric, numeric ddmatrix.
range	A set of interval endpoints, i.e. a numeric pair. Controls the set of values over which the eigenvalue search occurs.
range.type	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".
only.values	logical. Determines whether only the eigenvalues should be computed, or if the eigenvectors should as well.
abstol	The absolute error tolerance for the eigenvalues.
orfac	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.

Details

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.

Value

Returns a distributed matrix.

wrathematics/pbdDMAT documentation built on Oct. 2, 2024, 2:56 p.m.