Mutual information

English

Noun

1. Template:Lb A measure of the entropic (informational) correlation between two random variables.

   Mutual information $I(X;Y)$ between two random variables $X$ and $Y$ is what is left over when their mutual conditional entropies $H(Y|X)$ and $H(X|Y)$ are subtracted from their joint entropy $H(X,Y)$. It can be given by the formula $I(X;Y)=-\sum _x\sum _y{p}_{X,Y}(x,y){\log }_b\frac{p_{X,Y}(x,y)}{p_{X|Y}(x|y)p_{Y|X}(y|x)}$.

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Translations

• Chinese:

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See also

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