463
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更改
→公制 Metric
:<math>
:<math>
\begin{align}
\begin{align}
d(X,Y) &= \Eta(X,Y) - \operatorname{I}(X;Y) \\
d(X,Y) &= \Eta(X,Y) - \operatorname{I}(X;Y) \\
&= \Eta(X) + \Eta(Y) - 2\operatorname{I}(X;Y) \\
&= \Eta(X) + \Eta(Y) - 2\operatorname{I}(X;Y) \\
&= \Eta(X|Y) + \Eta(Y|X)
&= \Eta(X|Y) + \Eta(Y|X)
\end{align}
\end{align}
</math>
</math>
:<math>D(X,Y) = \frac{d(X, Y)}{\Eta(X, Y)} \le 1.</math>
:<math>D(X,Y) = \frac{d(X, Y)}{\Eta(X, Y)} \le 1.</math>
:<math>D(X,Y) = 1 - \frac{\operatorname{I}(X; Y)}{\Eta(X, Y)}.</math>
:<math>D(X,Y) = 1 - \frac{\operatorname{I}(X; Y)}{\Eta(X, Y)}.</math>
最后,
最后,
:<math>D^\prime(X, Y) = 1 - \frac{\operatorname{I}(X; Y)}{\max\left\{\Eta(X), \Eta(Y)\right\}}</math>
:<math>D^\prime(X, Y) = 1 - \frac{\operatorname{I}(X; Y)}{\max\left\{\Eta(X), \Eta(Y)\right\}}</math>
也是一个度量标准。
也是一个度量标准。
=== 条件互信息 Conditional mutual information ===
=== 条件互信息 Conditional mutual information ===