/usr/share/octave/packages/geometry-1.7.0/geom2d/normalizeVector.m is in octave-geometry 1.7.0-1build1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | ## Copyright (C) 2004-2011 David Legland <david.legland@grignon.inra.fr>
## Copyright (C) 2004-2011 INRA - CEPIA Nantes - MIAJ (Jouy-en-Josas)
## Copyright (C) 2012 Adapted to Octave by Juan Pablo Carbajal <carbajal@ifi.uzh.ch>
## All rights reserved.
##
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## -*- 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])))
|