Package ai.libs.jaicore.ml.metafeatures

Class GlobalCharacterizer

  • Direct Known Subclasses:
    LandmarkerCharacterizer, NoProbingCharacterizer
    public class GlobalCharacterizer
extends org.openml.webapplication.fantail.dc.Characterizer
    Characterizer that applies a number of Characterizers to a data set. Uses probing. Adapted from GlobalMetafeatures.

    • Field Summary

      Fields 
      Modifier and Type Field Description
      protected java.util.Map<org.openml.webapplication.fantail.dc.Characterizer,​java.lang.String> characterizerNames
      The names of the characterizers used
      protected java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer> characterizers
      The list of characterizers used in the computation of meta features
      protected java.util.Map<java.lang.String,​java.lang.Double> computationTimes
      The time it took to compute the meta features for each characterizer by name
      protected static java.lang.String CP_ASC  
      protected static java.lang.String CP_DS  
      protected static java.lang.String CP_IBK  
      protected static java.lang.String CP_NB  
      protected java.lang.String[] ids
      The names of all the meta features that are computed by this characterizer
      protected static java.lang.String PREPROCESSING_PREFIX  

    • Constructor Summary

      Constructors 
      Constructor Description
      GlobalCharacterizer()
      Initializes a new characterizer.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected void addLandmarkerCharacterizers​(java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer> characterizerList)  
      protected void addNoProbingCharacterizers​(java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer> characterizerList)  
      java.util.Map<java.lang.String,​java.lang.Double> characterize​(weka.core.Instances instances)  
      java.util.Map<java.lang.String,​java.util.List<java.lang.String>> getCharacterizerGroups()
      Gets the mapping of a Characterizer to the meta features it computes.
      java.util.List<java.lang.String> getCharacterizerNames()
      Gets the names of the used Characterizers.
      java.util.Map<org.openml.webapplication.fantail.dc.Characterizer,​java.lang.String> getCharacterizerNamesMappings()
      Gets names for the used Characterizers.
      java.util.List<org.openml.webapplication.fantail.dc.Characterizer> getCharacterizers()
      Gets the list of characterizers used in the computation of meta features.
      java.lang.String[] getIDs()  
      java.util.Map<java.lang.String,​java.lang.Double> getMetaFeatureComputationTimes()
      Gets the time in milliseconds it took to compute each group of meta features (Computed by a Characterizer).
      protected void initializeCharacterizerNames()
      Initializes characterizerNames.
      protected void initializeCharacterizers()
      Adds the required characterizers to characterizers.
      protected void initializeMetaFeatureIds()
      Initializes ids.
      java.lang.String toString()  

      • Methods inherited from class org.openml.webapplication.fantail.dc.Characterizer

        characterizeAll, getNumMetaFeatures

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

    • Field Detail

      • PREPROCESSING_PREFIX

        protected static final java.lang.String PREPROCESSING_PREFIX
        See Also:
        Constant Field Values

      • ids

        protected java.lang.String[] ids
        The names of all the meta features that are computed by this characterizer

      • characterizers

        protected java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer> characterizers
        The list of characterizers used in the computation of meta features

      • characterizerNames

        protected java.util.Map<org.openml.webapplication.fantail.dc.Characterizer,​java.lang.String> characterizerNames
        The names of the characterizers used

      • computationTimes

        protected java.util.Map<java.lang.String,​java.lang.Double> computationTimes
        The time it took to compute the meta features for each characterizer by name

    • Method Detail

      • characterize

        public java.util.Map<java.lang.String,​java.lang.Double> characterize​(weka.core.Instances instances)
        Specified by:
        characterize in class org.openml.webapplication.fantail.dc.Characterizer

      • toString

        public java.lang.String toString()
        Overrides:
        toString in class java.lang.Object

      • getCharacterizers

        public java.util.List<org.openml.webapplication.fantail.dc.Characterizer> getCharacterizers()
        Gets the list of characterizers used in the computation of meta features.
        Returns:
        The characterizers

      • getMetaFeatureComputationTimes

        public java.util.Map<java.lang.String,​java.lang.Double> getMetaFeatureComputationTimes()
        Gets the time in milliseconds it took to compute each group of meta features (Computed by a Characterizer). The computation times for the last time that characterize(Instances) was called are returned. The time is NaN if the meta feature could not be computed.
        Returns:
        The meta feature computation times

      • getCharacterizerNames

        public java.util.List<java.lang.String> getCharacterizerNames()
        Gets the names of the used Characterizers.
        Returns:
        The names of the characterizers

      • getCharacterizerNamesMappings

        public java.util.Map<org.openml.webapplication.fantail.dc.Characterizer,​java.lang.String> getCharacterizerNamesMappings()
        Gets names for the used Characterizers.
        Returns:
        The used Characterizers mapped to their names

      • getCharacterizerGroups

        public java.util.Map<java.lang.String,​java.util.List<java.lang.String>> getCharacterizerGroups()
        Gets the mapping of a Characterizer to the meta features it computes.
        Returns:
        The mapping of Characterizer names to their meta features

      • getIDs

        public java.lang.String[] getIDs()
        Specified by:
        getIDs in class org.openml.webapplication.fantail.dc.Characterizer

      • initializeCharacterizers

        protected void initializeCharacterizers()
                                 throws java.lang.Exception
        Adds the required characterizers to characterizers.
        Throws:
        java.lang.Exception

      • addNoProbingCharacterizers

        protected void addNoProbingCharacterizers​(java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer> characterizerList)

      • addLandmarkerCharacterizers

        protected void addLandmarkerCharacterizers​(java.util.ArrayList<org.openml.webapplication.fantail.dc.Characterizer> characterizerList)
                                    throws java.lang.Exception
        Throws:
        java.lang.Exception

      • initializeCharacterizerNames

        protected void initializeCharacterizerNames()
        Initializes characterizerNames.

      • initializeMetaFeatureIds

        protected void initializeMetaFeatureIds()
        Initializes ids.