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a guest Jun 20th, 2019 79 Never
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  1. function [BOOL] = chk_Euler_rule(V, F)
  2.     V_n = size(V, 1);
  3.     F_n = size(F, 2);
  4.     arr = zeros(V_n, V_n);
  5.    
  6.     for i = 1 : F_n
  7.         a = F(1, i);
  8.         b = F(2, i);
  9.         c = F(3, i);
  10.        
  11.         if a < b
  12.             arr(a,b) = 1;
  13.         else
  14.             arr(b,a) = 1;
  15.         end
  16.        
  17.         if a < c
  18.             arr(a,c) = 1;
  19.         else
  20.             arr(c,a) = 1;
  21.         end
  22.        
  23.         if b < c
  24.             arr(b,c) = 1;
  25.         else
  26.             arr(c,b) = 1;
  27.         end
  28.     end
  29.    
  30.     E_n = sum(arr(:) == 1);
  31.     expected = V_n + F_n -2
  32.     actual = E_n
  33.     BOOL = expected == actual;
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