[Octave-cvsupdate] SF.net SVN: octave:[9075] trunk/octave-forge/extra/quaternion_oo

[<par...@us...>]

Revision: 9075
          http://octave.svn.sourceforge.net/octave/?rev=9075&view=rev
Author:   paramaniac
Date:     2011-11-13 13:43:25 +0000 (Sun, 13 Nov 2011)
Log Message:
-----------
quaternion-oo: add norm

Modified Paths:
--------------
    trunk/octave-forge/extra/quaternion_oo/INDEX

Added Paths:
-----------
    trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/norm.m

Modified: trunk/octave-forge/extra/quaternion_oo/INDEX
===================================================================
--- trunk/octave-forge/extra/quaternion_oo/INDEX	2011-11-13 13:32:36 UTC (rev 9074)
+++ trunk/octave-forge/extra/quaternion_oo/INDEX	2011-11-13 13:43:25 UTC (rev 9075)
@@ -9,6 +9,7 @@
   @quaternion/columns
   @quaternion/size
   @quaternion/unit
+  @quaternion/norm
 Overloaded and Arithmetic Operators
   @quaternion/plus
   @quaternion/minus

Added: trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/norm.m
===================================================================
--- trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/norm.m	                        (rev 0)
+++ trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/norm.m	2011-11-13 13:43:25 UTC (rev 9075)
@@ -0,0 +1,39 @@
+## Copyright (C) 2011   Lukas F. Reichlin
+##
+## This program is free software: you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, either version 3 of the License, or
+## (at your option) any later version.
+##
+## This program is distributed in the hope that it will be useful,
+## but WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+## GNU General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {@var{n} =} norm (@var{q})
+## Norm of a quaternion.
+## @end deftypefn
+
+## Author: Lukas Reichlin <luk...@gm...>
+## Created: November 2011
+## Version: 0.1
+
+
+function n = norm (a)
+
+  if (nargin != 1)
+    print_usage ();
+  endif
+  
+  if (! isscalar (a.w))
+    warning ("norm: use ""abs"" to calculate the lengths of quaternion arrays");
+    error ("norm: only the 2-norm of scalar quaternions is implemented until now");
+  endif
+
+  n = abs (a);
+
+endfunction

This was sent by the SourceForge.net collaborative development platform, the world's largest Open Source development site.