Matlab error, what am I doing wrong?

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Lala
Lala 2014-8-26
评论： José-Luis 2014-8-26
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.

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José-Luis
José-Luis 2014-8-26
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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Lala
Lala 2014-8-26
Ok, thank you once again, you have been very helpful.
José-Luis
José-Luis 2014-8-26
My pleasure. Please accept an answer if it helped you.

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