<Table> <Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (November 2008) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This article does not cite any sources . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (November 2008) (Learn how and when to remove this template message) </Td> </Tr> <P> In decision tree learning, Information gain ratio is a ratio of information gain to the intrinsic information . It is used to reduce a bias towards multi-valued attributes by taking the number and size of branches into account when choosing an attribute . </P> <P> Information Gain is also known as Mutual Information . </P>

When is gain ratio required to be calculated