Class C45Loader

    • Field Detail

      • FILE_EXTENSION

        public static java.lang.String FILE_EXTENSION
        the file extension
    • Constructor Detail

      • C45Loader

        public C45Loader()
    • Method Detail

      • globalInfo

        public java.lang.String globalInfo()
        Returns a string describing this attribute evaluator
        Returns:
        a description of the evaluator suitable for displaying in the explorer/experimenter gui
      • reset

        public void reset()
                   throws java.io.IOException
        Resets the Loader ready to read a new data set or the same data set again.
        Specified by:
        reset in interface Loader
        Overrides:
        reset in class AbstractFileLoader
        Throws:
        java.io.IOException - if something goes wrong
      • getFileExtension

        public java.lang.String getFileExtension()
        Get the file extension used for arff files
        Specified by:
        getFileExtension in interface FileSourcedConverter
        Returns:
        the file extension
      • getFileExtensions

        public java.lang.String[] getFileExtensions()
        Gets all the file extensions used for this type of file
        Specified by:
        getFileExtensions in interface FileSourcedConverter
        Returns:
        the file extensions
      • getFileDescription

        public java.lang.String getFileDescription()
        Returns a description of the file type.
        Specified by:
        getFileDescription in interface FileSourcedConverter
        Returns:
        a short file description
      • setSource

        public void setSource​(java.io.File file)
                       throws java.io.IOException
        Resets the Loader object and sets the source of the data set to be the supplied File object.
        Specified by:
        setSource in interface Loader
        Overrides:
        setSource in class AbstractFileLoader
        Parameters:
        file - the source file.
        Throws:
        java.io.IOException - if an error occurs
      • getStructure

        public Instances getStructure()
                               throws java.io.IOException
        Determines and returns (if possible) the structure (internally the header) of the data set as an empty set of instances.
        Specified by:
        getStructure in interface Loader
        Specified by:
        getStructure in class AbstractLoader
        Returns:
        the structure of the data set as an empty set of Instances
        Throws:
        java.io.IOException - if an error occurs
      • getDataSet

        public Instances getDataSet()
                             throws java.io.IOException
        Return the full data set. If the structure hasn't yet been determined by a call to getStructure then method should do so before processing the rest of the data set.
        Specified by:
        getDataSet in interface Loader
        Specified by:
        getDataSet in class AbstractLoader
        Returns:
        the structure of the data set as an empty set of Instances
        Throws:
        java.io.IOException - if there is no source or parsing fails
      • getNextInstance

        public Instance getNextInstance​(Instances structure)
                                 throws java.io.IOException
        Read the data set incrementally---get the next instance in the data set or returns null if there are no more instances to get. If the structure hasn't yet been determined by a call to getStructure then method should do so before returning the next instance in the data set. If it is not possible to read the data set incrementally (ie. in cases where the data set structure cannot be fully established before all instances have been seen) then an exception should be thrown.
        Specified by:
        getNextInstance in interface Loader
        Specified by:
        getNextInstance in class AbstractLoader
        Parameters:
        structure - the dataset header information, will get updated in case of string or relational attributes
        Returns:
        the next instance in the data set as an Instance object or null if there are no more instances to be read
        Throws:
        java.io.IOException - if there is an error during parsing
      • getRevision

        public java.lang.String getRevision()
        Returns the revision string.
        Specified by:
        getRevision in interface RevisionHandler
        Returns:
        the revision
      • main

        public static void main​(java.lang.String[] args)
        Main method for testing this class.
        Parameters:
        args - should contain <filestem>[.names | data]