I have a small problem in coding confusion 3×3 matrix by using matlab…
I tried the code below,
average = sum(diag(Mconf)./sum(Mconf,2))/3;
However, it get NaN for the confusion matrix is [0 0 0;1 2 3;4 5 6] or [1 2 3;0 0 0;4 5 6] or [1 2 3;4 5 6;0 0 0]
Try
To eliminate the division by zero.