21.2 Linear Algebra with Diagonal/Permutation Matrices

As has been already said, diagonal and permutation matrices make it possible to use efficient algorithms while preserving natural linear algebra syntax. This section describes in detail the operations that are treated specially when performed on these special matrix objects.

© 1996–2020 John W. Eaton
Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice and this permission notice are preserved on all copies.
Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided that the entire resulting derived work is distributed under the terms of a permission notice identical to this one.
Permission is granted to copy and distribute translations of this manual into another language, under the above conditions for modified versions.
https://octave.org/doc/v5.2.0/Matrix-Algebra.html