MATLAB: Matlab error, what am I doing wrong

function errorinput character error

I have written the followin code on Matlab :
   class1 = [0, 0; 0, 1; 2, 2; 3, 1; 3, 2; 3, 3;];
   class2 = [6, 9; 8, 9; 9, 8; 9, 9; 9, 10; 8, 11;];
   mu1 = mean(class1);
   mu2 = mean(class2);
   sigma1 = cov(class1);
   sigma2 = cov(class2);
   syms x y;
   g1 = -0.5*([x;y]-mu1’)’*inv(sigma1)*([x;y]-mu1’)-log(2*pi)-0.5*log(det(sigma1));
   g2 = -0.5*([x;y]-mu2’)’*inv(sigma2)*([x;y]-mu2’)-log(2*pi)-0.5*log(det(sigma2));
   g = g1 - g2;
   ezplot(g, [[-1,11], [-1,11]]);
and this is the error I keep getting :
   ??? g1 = -0.5*([x;y]-mu1’)’*inv(sigma1)*([x;y]-mu1’)-log(2*pi)-0.5*log(det(sigma1));
                    |
   Error: The input character is not valid in MATLAB statements or expressions.

Best Answer

The transpose character is not what you think it is:
 g1 = -0.5*([x;y]-mu1')'*inv(sigma1)*([x;y]-mu1')-log(2*pi)-0.5*log(det(sigma1));
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