***************************************************************************
  * All the software  contained in this library  is protected by copyright. *
  * Permission  to use, copy, modify, and  distribute this software for any *
  * purpose without fee is hereby granted, provided that this entire notice *
  * is included  in all copies  of any software which is or includes a copy *
  * or modification  of this software  and in all copies  of the supporting *
  * documentation for such software.                                        *
  ***************************************************************************
  * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED *
  * WARRANTY. IN NO EVENT, NEITHER  THE AUTHORS, NOR THE PUBLISHER, NOR ANY *
  * MEMBER  OF THE EDITORIAL BOARD OF  THE JOURNAL  "NUMERICAL ALGORITHMS", *
  * NOR ITS EDITOR-IN-CHIEF, BE  LIABLE FOR ANY ERROR  IN THE SOFTWARE, ANY *
  * MISUSE  OF IT  OR ANY DAMAGE ARISING OUT OF ITS USE. THE ENTIRE RISK OF *
  * USING THE SOFTWARE LIES WITH THE PARTY DOING SO.                        *
  ***************************************************************************
  * ANY USE  OF THE SOFTWARE  CONSTITUTES  ACCEPTANCE  OF THE TERMS  OF THE *
  * ABOVE STATEMENT AND OF THE ACCOMPANYING FILE LICENSE.txt.               *
  ***************************************************************************

   AUTHORS:

       Per Christian Hansen
       Technical University of Denmark
       Email: [email protected]

       Jakob Sauer Jørgensen
       Technical University of Denmark
       Email: [email protected]

   REFERENCE:

       Computed Tomography: Algorithms, Insight and Just Enough Theory
       P. C. Hansen, J. S. Jørgensen, W. R. B. Lionheart (Eds.)
       Fundamentals of Algorithms, FA18, SIAM, Philadelphia, PA, 2021

   SOFTWARE REVISION DATE:

       V1.0, July 2021

   SOFTWARE LANGUAGE:

       MATLAB 9.4 (R2018a)


=====================================================================
SOFTWARE
=====================================================================

These functions are needed for some of the computational exercises in
the above book.

The software has been developed and tested using MATLAB version 9.4.
No other MathWorks products or toolboxes are required.


=====================================================================
HOW TO INSTALL AND THE FILES
=====================================================================

Please follow these steps:

- Clone the repository or download as a zip-file and unpack into a
  new directory.

- Start MATLAB and go to the directory of the files, or update
  MATLAB's path with this directory.