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Home/ Questions/Q 6957623
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Editorial Team
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Editorial Team
Asked: May 27, 20262026-05-27T15:01:43+00:00 2026-05-27T15:01:43+00:00

I have a small problem in coding confusion 3×3 matrix by using matlab… I

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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]

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  1. Editorial Team
    Editorial Team
    2026-05-27T15:01:43+00:00Added an answer on May 27, 2026 at 3:01 pm

    Try

    average = sum(diag(Mconf)./sum(Mconf+eps,2))/3;
    

    To eliminate the division by zero.

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