Mean square error of two matrices

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Anurag Pujari
Anurag Pujari 2013-4-1
编辑： Lorson Blair 2022-4-2
How to calculate the mean square error of two matrices? How to use the inbuilt MATLAB function msc for that?The Mathworks help for mse is not clear to me.

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Wayne King
Wayne King 2013-4-1
Do you have the Wavelet Toolbox? If so, you can use measerr(), otherwise, suppose your original matrix is X and your approximation is Xapp
X = randn(256,256);
Xapp = randn(256,256);
D = abs(X-Xapp).^2;
MSE = sum(D(:))/numel(X);
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Lorson Blair
Lorson Blair 2022-4-2
编辑：Lorson Blair 2022-4-2
For persons who still have questions about this, you can use the Frobenius norm:
A = randi(10,3);
B = randi(25,3);
MSE = norm(A-B,'fro')^2/numel(A);

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