Interface AttributeTransformer

  • All Known Implementing Classes:
    LatentSemanticAnalysis, PrincipalComponents

    public interface AttributeTransformer
    Abstract attribute transformer. Transforms the dataset.
    Version:
    $Revision: 4613 $
    Author:
    Mark Hall (mhall@cs.waikato.ac.nz)
    • Method Detail

      • transformedHeader

        Instances transformedHeader()
                             throws java.lang.Exception
        Returns just the header for the transformed data (ie. an empty set of instances. This is so that AttributeSelection can determine the structure of the transformed data without actually having to get all the transformed data through getTransformedData().
        Returns:
        the header of the transformed data.
        Throws:
        java.lang.Exception - if the header of the transformed data can't be determined.
      • transformedData

        Instances transformedData​(Instances data)
                           throws java.lang.Exception
        Transform the supplied data set (assumed to be the same format as the training data)
        Returns:
        A set of instances representing the transformed data
        Throws:
        java.lang.Exception - if the attribute could not be evaluated
      • convertInstance

        Instance convertInstance​(Instance instance)
                          throws java.lang.Exception
        Transforms an instance in the format of the original data to the transformed space
        Returns:
        a transformed instance
        Throws:
        java.lang.Exception - if the instance could not be transformed