Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / nurbs-1.3.6 / vecmag2.m

diff --git a/octave_packages/nurbs-1.3.6/vecmag2.m b/octave_packages/nurbs-1.3.6/vecmag2.m
new file mode 100644 (file)
index 0000000..bba6f74
--- /dev/null
+++ b/octave_packages/nurbs-1.3.6/vecmag2.m
@@ -0,0 +1,47 @@
+function mag = vecmag2(vec)
+% 
+% VECMAG2: Squared magnitude of a set of vectors.
+% 
+% Calling Sequence:
+% 
+%   mvec = vecmag2(vec)
+% 
+% INPUT:
+% 
+%   vec                : An array of column vectors represented by a matrix of
+%              size (dim,nv), where dim is the dimension of the vector and
+%              nv the number of vectors.
+%
+% OUTPUT:
+% 
+%   mvec       : Squared magnitude of the vectors, vector of size (1,nv).
+% 
+% Description:
+% 
+%   Determines the squared magnitude of the vectors.
+% 
+% Examples:
+% 
+%   Find the squared magnitude of the two vectors (0.0,2.0,1.3)
+%   and (1.5,3.4,2.3)
+% 
+%   mvec = vecmag2([0.0 1.5; 2.0 3.4; 1.3 2.3]);
+%
+%    Copyright (C) 2000 Mark Spink
+%
+%    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 2 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/>.
+
+mag = sum(vec.^2);
+
+end