\[MCC=\ \frac{TP\times TN-FP\times FN}{\sqrt{\left(TP+FP\right)\left(TP+FN\right)\left(TN+FP\right)\left(TN+FN\right)+e}}\]
where \(TP=\ \mathbf{y\ \cdot}\hat{\mathbf{y}}\),
\(TN=(\mathbf{1}-\mathbf{y)\cdot(1-}\hat{\mathbf{y}})\),
\(FP=\left(\mathbf{1}-\mathbf{y}\right)\mathbf{\cdot}\hat{\mathbf{y}}\),
\(FN=\mathbf{y\cdot}\left(\mathbf{1-}\hat{\mathbf{y}}\right)\),
and \(e\) is a very small number preventing division by zero,
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(2)
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