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## weka.classifiers.evaluation
Class EvaluationUtils

    java.lang.Object
      weka.classifiers.evaluation.EvaluationUtils

All Implemented Interfaces:
  RevisionHandler

    public class EvaluationUtils

extends java.lang.Object
implements RevisionHandler

Contains utility functions for generating lists of predictions in various manners.

Version:
  $Revision: 1.11 $
Author:
  Len Trigg (len@reeltwo.com)

Constructor Summary
`EvaluationUtils()`

Method Summary
`FastVector` | `getCVPredictions(Classifier classifier, Instances data, int numFolds)` Generate a bunch of predictions ready for processing, by performing a cross-validation on the supplied dataset.
`Prediction` | `getPrediction(Classifier classifier, Instance test)` Generate a single prediction for a test instance given the pre-trained classifier.
`java.lang.String` | `getRevision()` Returns the revision string.
`int` | `getSeed()` Gets the seed for randomization during cross-validation
`FastVector` | `getTestPredictions(Classifier classifier, Instances test)` Generate a bunch of predictions ready for processing, by performing a evaluation on a test set assuming the classifier is already trained.
`FastVector` | `getTrainTestPredictions(Classifier classifier, Instances train, Instances test)` Generate a bunch of predictions ready for processing, by performing a evaluation on a test set after training on the given training set.
`void` | `setSeed(int seed)` Sets the seed for randomization during cross-validation

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### EvaluationUtils

    public EvaluationUtils()

Method Detail

### setSeed

    public void setSeed(int seed)

  Sets the seed for randomization during cross-validation

### getSeed

    public int getSeed()

  Gets the seed for randomization during cross-validation

### getCVPredictions

    public FastVector getCVPredictions(Classifier classifier,
                                       Instances data,
                                       int numFolds)
                                throws java.lang.Exception

  Generate a bunch of predictions ready for processing, by performing a cross-validation on the supplied dataset.

  Parameters:
    `classifier` - the Classifier to evaluate
    `data` - the dataset
    `numFolds` - the number of folds in the cross-validation.
  Throws:
    `java.lang.Exception` - if an error occurs

### getTrainTestPredictions

    public FastVector getTrainTestPredictions(Classifier classifier,
                                              Instances train,
                                              Instances test)
                                       throws java.lang.Exception

  Generate a bunch of predictions ready for processing, by performing a evaluation on a test set after training on the given training set.

  Parameters:
    `classifier` - the Classifier to evaluate
    `train` - the training dataset
    `test` - the test dataset
  Throws:
    `java.lang.Exception` - if an error occurs

### getTestPredictions

    public FastVector getTestPredictions(Classifier classifier,
                                         Instances test)
                                  throws java.lang.Exception

  Generate a bunch of predictions ready for processing, by performing a evaluation on a test set assuming the classifier is already trained.

  Parameters:
    `classifier` - the pre-trained Classifier to evaluate
    `test` - the test dataset
  Throws:
    `java.lang.Exception` - if an error occurs

### getPrediction

    public Prediction getPrediction(Classifier classifier,
                                    Instance test)
                             throws java.lang.Exception

  Generate a single prediction for a test instance given the pre-trained classifier.

  Parameters:
    `classifier` - the pre-trained Classifier to evaluate
    `test` - the test instance
  Throws:
    `java.lang.Exception` - if an error occurs

### getRevision

    public java.lang.String getRevision()

  Returns the revision string.

  Specified by:
    `getRevision` in interface `RevisionHandler`
  Returns:
    the revision

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