Relative Mutual Information

Relative Mutual Information


Based on Mutual Information, Relative Mutual Information is defined as:

IR(X,Y)=I(X,Y)H(X){I_R}\left( {X,Y} \right){\rm{ }} = {\rm{ }}{{I\left( {X,Y} \right)} \over {H\left( X \right)}}

Relative Mutual Information expresses in percent how much the entropy (or uncertainty) of XX is reduced by observing YY.

  • In older versions of BayesiaLab, Relative Mutual Information was also called Normalized Mutual Information.
  • Please see the up-to-date definition of Normalized Mutual Information.


  • BayesiaLab reports the Relative Mutual Information in the Target Analysis Report: Menu > Analysis > Report > Target > Relationship with Target Node.
  • Note that this table shows the Relative Mutual Information of each node, e.g., XRay, Dyspnea, etc., only with regard to the Target Node, Cancer.
  • The Relative Mutual Information can also be shown by selecting Menu > Analysis > Visual > Overall > Arc > Mutual Information and then clicking the Show Arc Comments icon or selecting Menu > View > Show Arc Comments.
  • Note that the corresponding options under Preferences > Analysis > Visual Analysis > Arc's Mutual Information Analysis have to be selected first:
  • In Preferences, Child refers to the Relative Mutual Information from the Parent onto the Child node, i.e., in the direction of the arc.
  • Conversely, Parent refers to the Relative Mutual Information from the Child onto the Parent node, i.e., in the opposite direction of the arc.

For North America

Bayesia USA

4235 Hillsboro Pike
Suite 300-688
Nashville, TN 37215, USA

+1 888-386-8383

Head Office

Bayesia S.A.S.

Parc Ceres, Batiment N 21
rue Ferdinand Buisson
53810 Change, France

For Asia/Pacific

Bayesia Singapore

1 Fusionopolis Place
#03-20 Galaxis
Singapore 138522

Copyright © 2024 Bayesia S.A.S., Bayesia USA, LLC, and Bayesia Singapore Pte. Ltd. All Rights Reserved.