finding the right matrix

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alexis cordova 2019-8-4

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https://ww2.mathworks.cn/matlabcentral/answers/474768-finding-the-right-matrix

评论： Walter Roberson 2019-8-4

ni(i,1:2) is supposed to be a 2x2 vector but i keep getting a 1x2, help please

x = [0 0; 200 0; 200 25; 25 25; 25 200; 0 200;0 0];
n = size(x,1); % size will be equal to 7
n = n-1;
% initialize properties 
Asum = 0 ; % a scalar 
psum = zeros(1,2); % 1 x 2 matrix 
R = zeros(2,2); % 2 x 2 matrix
% 3. loop over sides 
for i = 1:n % 5 points 
  
 h(i) = norm(x(i,:));
   % from 3a as well 
 ni(i,1:2) = x(i,:)';     %------------------------------------
 b(i) =norm(x(i+1,:)-(x(i,:)));
 mi(i,1:2) = (x(i+1,:)-x(i,:))';
 
if h>0 
    ni = ni/h(i);
end
 if b(i)>0
  mi(i,1:2) = mi(i,1:2)/b(i);
end 