MATLAB: Error between each pixel for two matrices of equal size

errormatricesmatrix

I'm trying to find the error between to matrices of equal size. Let's say that my matrices are of size 4×4 :

A = [0 1 0 0; 1 1 0 0; 0 1 0 1; 0 1 1 0];
B = rand(4,4);

How would you find the error between each pixel of those matrices?

Wouldn't it just be

theError = A - B;

Caution: don't use error for the variable name since that is the name of a built-in MATLAB function.

If you have the Statistics and Machine Learning Toolbox, you can used the pca function.

c1 = 1:2:59 ;
c2 = 2:2:60 ;
c3 = 3:2:61 ;
o = zeros(length(c1),24) ;
C = [c1' c2' c3' o]