Packageweka.attributeSelection

Synopsis

SymmetricalUncertAttributeEval :

Evaluates the worth of an attribute by measuring the symmetrical uncertainty with respect to the class.

SymmU(Class, Attribute) = 2 * (H(Class) - H(Class | Attribute)) / H(Class) + H(Attribute).

The table below describes the options available for SymmetricalUncertAttributeEval.

Option	Description
missingMerge	Distribute counts for missing values. Counts are distributed across other values in proportion to their frequency. Otherwise, missing is treated as a separate value.

The table below describes the capabilites of SymmetricalUncertAttributeEval.

Capability	Supported
Class	Missing class values, Nominal class, Binary class
Attributes	Nominal attributes, Date attributes, Binary attributes, Empty nominal attributes, Numeric attributes, Missing values, Unary attributes
Min # of instances	1