ordschur {control}

Ordered schur decomposition

Description

ordschur Orders a schur decomposition

Usage

ordschur(Ui, Si, idx)

Arguments

Ui

Square upper-triangular matrix matrix from schur decomposition. If Ui is not given it is set to the identity matrix.

Si

Orthogonal matrix from schur decomposition

idx

array index

Details

ordschur finds an orthogonal matrix, U so that the eigenvalues appearing on the diagonal of Si are ordered according to the increasing values of the array index where the i-th element of index corresponds to the eigenvalue appearing as the element Si[i,i].

ordschur could also be used in this syntax: ordschur(Si, idx)

Value

Returns a list of ordered (U, S)