| Interface | Description | 
|---|---|
| IntervalEstimator | Interface for classifiers that can output confidence intervals | 
| IterativeClassifier | Interface for classifiers that can induce models of growing
 complexity one step at a time. | 
| Sourcable | Interface for classifiers that can be converted to Java source. | 
| UpdateableClassifier | Interface to incremental classification models that can learn using
 one instance at a time. | 
| Class | Description | 
|---|---|
| BVDecompose | Class for performing a Bias-Variance decomposition on any classifier using the method specified in: Ron Kohavi, David H. | 
| BVDecomposeSegCVSub | This class performs Bias-Variance decomposion on any classifier using the sub-sampled cross-validation procedure as specified in (1). The Kohavi and Wolpert definition of bias and variance is specified in (2). The Webb definition of bias and variance is specified in (3). Geoffrey I. | 
| CheckClassifier | Class for examining the capabilities and finding problems with 
 classifiers. | 
| CheckSource | A simple class for checking the source generated from Classifiers
 implementing the  weka.classifiers.Sourcableinterface. | 
| Classifier | Abstract classifier. | 
| CostMatrix | Class for storing and manipulating a misclassification cost matrix. | 
| Evaluation | Class for evaluating machine learning models. | 
| IteratedSingleClassifierEnhancer | Abstract utility class for handling settings common to
 meta classifiers that build an ensemble from a single base learner. | 
| MultipleClassifiersCombiner | Abstract utility class for handling settings common to
 meta classifiers that build an ensemble from multiple classifiers. | 
| RandomizableClassifier | Abstract utility class for handling settings common to randomizable
 classifiers. | 
| RandomizableIteratedSingleClassifierEnhancer | Abstract utility class for handling settings common to randomizable
 meta classifiers that build an ensemble from a single base learner. | 
| RandomizableMultipleClassifiersCombiner | Abstract utility class for handling settings common to randomizable
 meta classifiers that build an ensemble from multiple classifiers based
 on a given random number seed. | 
| RandomizableSingleClassifierEnhancer | Abstract utility class for handling settings common to randomizable
 meta classifiers that build an ensemble from a single base learner. | 
| SingleClassifierEnhancer | Abstract utility class for handling settings common to meta
 classifiers that use a single base learner. |