[Octave-cvsupdate] SF.net SVN: octave:[7556] trunk/octave-forge/extra/quaternion_oo

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

Revision: 7556
          http://octave.svn.sourceforge.net/octave/?rev=7556&view=rev
Author:   paramaniac
Date:     2010-08-19 07:41:03 +0000 (Thu, 19 Aug 2010)

Log Message:
-----------
quaternion-oo: add abs.m

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

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

Modified: trunk/octave-forge/extra/quaternion_oo/INDEX
===================================================================
--- trunk/octave-forge/extra/quaternion_oo/INDEX	2010-08-18 21:35:28 UTC (rev 7555)
+++ trunk/octave-forge/extra/quaternion_oo/INDEX	2010-08-19 07:41:03 UTC (rev 7556)
@@ -1,6 +1,7 @@
 quaternion >> Quaternion
 Quaternions
   quaternion
+  @quaternion/abs
   @quaternion/conj
   @quaternion/diag
   @quaternion/ispure

Added: trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/abs.m
===================================================================
--- trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/abs.m	                        (rev 0)
+++ trunk/octave-forge/extra/quaternion_oo/inst/@quaternion/abs.m	2010-08-19 07:41:03 UTC (rev 7556)
@@ -0,0 +1,39 @@
+## Copyright (C) 2010   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{qabs} =} abs (@var{q})
+## Modulus of a quaternion.
+##
+## @example
+## q = w + x*i + y*j + z*k
+## abs (q) = sqrt (w.^2 + x.^2 + y.^2 + z.^2)
+## @end example
+## @end deftypefn
+
+## Author: Lukas Reichlin <luk...@gm...>
+## Created: August 2010
+## Version: 0.1
+
+
+function b = abs (a)
+
+  if (nargin != 1)
+    print_usage ();
+  endif
+
+  b = sqrt (a.w.^2 + a.x.^2 + a.y.^2 + a.z.^2);
+
+endfunction
\ No newline at end of file


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