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-
- RLaB Contributors Form
-
- If you are developing rfiles that you wish to share with
- others or contribute to the RLaB distribution, please fill out
- this form and mail it to ians@eskimo.com.
-
- Likewise, before you begin development, it would be good to
- check and see if others are working on the same or similar
- projects. If you want to know what is currently "in-work",
- send mail to ians@eskimo.com and you will receive a copy of
- the contributor's database.
-
- -------------------- Contributor's Form ----------------------
-
- Project Name:
-
- Technical Subject Area:
-
- Application Area(s):
-
- Author's Name:
- Author's e-mail:
-
- Rfile Name(s):
-
- Description:
-
- -------------------- Contributor's Form ----------------------
-
- At the bottom is the "suggested" form for documentation of
- rfiles. No one will change your work if you do not follow
- this format.
-
- If this form is not adequate, then please send suggestions to
- ians@eskimo.com
-
- Enjoy,
- Ian Searle
- ians@eskimo.com
-
- //-------------------------------------------------------------------//
-
- // Synopsis: Band reduction by two-sided unitary transformations.
-
- // Syntax: bandred ( A , KL, KU )
-
- // Description:
-
- // bandred(A, KL, KU) is a matrix unitarily equivalent to A with
- // lower bandwidth KL and upper bandwidth KU (i.e. B(i,j) = 0 if
- // i > j+KL or j > i+KU). The reduction is performed using
- // Householder transformations. If KU is omitted it defaults to
- // KL.
-
- // Called by randsvd.
- // This is a `standard' reduction. Cf. reduction to bidiagonal
- // form prior to computing the SVD. This code is a little
- // wasteful in that it computes certain elements which are
- // immediately set to zero!
- //
- // Reference:
- // G.H. Golub and C.F. Van Loan, Matrix Computations, second edition,
- // Johns Hopkins University Press, Baltimore, Maryland, 1989.
- // Section 5.4.3.
-
- // This file is a translation of bandred.m from version 2.0 of
- // "The Test Matrix Toolbox for Matlab", described in Numerical
- // Analysis Report No. 237, December 1993, by N. J. Higham.
-
- // Dependencies
- rfile house
-
- //-------------------------------------------------------------------//
-
-