vecmag2.m

非均匀有理B样条的matlab程序

function mag = vecmag2(vec)
% 
% Function Name:
% 
%   vecmag - Squared magnitude of the vectors
% 
% Calling Sequence:
% 
%   mvec = vecmag2(vec)
% 
% Parameters:
% 
%   vec		: An array of column vectors represented by a matrix of
% 		size (dim,nv), where is the dimension of the vector and
% 		nv the number of vectors.
% 
%   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]);

%  D.M. Spink
%  Copyright (c) 2000.

mag = sum(vec.^2);