X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?p=CreaPhase.git;a=blobdiff_plain;f=octave_packages%2Fgeometry-1.5.0%2Fgeom2d%2FnormalizeVector.m;fp=octave_packages%2Fgeometry-1.5.0%2Fgeom2d%2FnormalizeVector.m;h=4ef77b67da27a7a89f2f741b570a9cf289a5d849;hp=0000000000000000000000000000000000000000;hb=f5f7a74bd8a4900f0b797da6783be80e11a68d86;hpb=1705066eceaaea976f010f669ce8e972f3734b05 diff --git a/octave_packages/geometry-1.5.0/geom2d/normalizeVector.m b/octave_packages/geometry-1.5.0/geom2d/normalizeVector.m new file mode 100644 index 0000000..4ef77b6 --- /dev/null +++ b/octave_packages/geometry-1.5.0/geom2d/normalizeVector.m @@ -0,0 +1,72 @@ +%% Copyright (c) 2011, INRA +%% 2004-2011, David Legland +%% 2011 Adapted to Octave by Juan Pablo Carbajal +%% +%% All rights reserved. +%% (simplified BSD License) +%% +%% Redistribution and use in source and binary forms, with or without +%% modification, are permitted provided that the following conditions are met: +%% +%% 1. Redistributions of source code must retain the above copyright notice, this +%% list of conditions and the following disclaimer. +%% +%% 2. Redistributions in binary form must reproduce the above copyright notice, +%% this list of conditions and the following disclaimer in the documentation +%% and/or other materials provided with the distribution. +%% +%% THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" +%% AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +%% IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +%% ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE +%% LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR +%% CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF +%% SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS +%% INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN +%% CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) +%% ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE +%% POSSIBILITY OF SUCH DAMAGE. +%% +%% The views and conclusions contained in the software and documentation are +%% those of the authors and should not be interpreted as representing official +%% policies, either expressed or implied, of copyright holder. + +%% -*- texinfo -*- +%% @deftypefn {Function File} {@var{vn} = } normalizeVector (@var{v}) +%% Normalize a vector to have norm equal to 1 +%% +%% Returns the normalization of vector @var{v}, such that ||@var{v}|| = 1. +%% @var{v} can be either a row or a column vector. +%% +%% When @var{v} is a MxN array, normalization is performed for each row of the +%% array. +%% +%% Example: +%% +%% @example +%% vn = normalizeVector([3 4]) +%% vn = +%% 0.6000 0.8000 +%% vectorNorm(vn) +%% ans = +%% 1 +%% @end example +%% +%% @seealso{vectors2d, vectorNorm} +%% @end deftypefn + +function vn = normalizeVector(v) + + dim = size(v); + + if dim(1)==1 || dim(2)==1 + vn = v / sqrt(sum(v.^2)); + else + %same as: vn = v./repmat(sqrt(sum(v.*v, 2)), [1 dim(2)]); + vn = bsxfun(@rdivide, v, sqrt(sum(v.^2, 2))); + end + +endfunction + +%!assert (1,vectorNorm (normalizeVector ([3 4]))) +