public final class InfoGainSplitCrit extends EntropyBasedSplitCrit
Constructor and Description |
---|
InfoGainSplitCrit() |
Modifier and Type | Method and Description |
---|---|
java.lang.String |
getRevision()
Returns the revision string.
|
double |
splitCritValue(Distribution bags)
This method is a straightforward implementation of the information
gain criterion for the given distribution.
|
double |
splitCritValue(Distribution bags,
double totalNoInst)
This method computes the information gain in the same way
C4.5 does.
|
double |
splitCritValue(Distribution bags,
double totalNoInst,
double oldEnt)
This method computes the information gain in the same way
C4.5 does.
|
logFunc, newEnt, oldEnt, splitEnt
splitCritValue, splitCritValue, splitCritValue
public final double splitCritValue(Distribution bags)
splitCritValue
in class SplitCriterion
public final double splitCritValue(Distribution bags, double totalNoInst)
bags
- the distributiontotalNoInst
- weight of ALL instances (including the
ones with missing values).public final double splitCritValue(Distribution bags, double totalNoInst, double oldEnt)
bags
- the distributiontotalNoInst
- weight of ALL instancesoldEnt
- entropy with respect to "no-split"-model.public java.lang.String getRevision()