Examples of weka.core.UnassignedClassException

weka.core.UnassignedClassException
Exception that is raised when trying to use some data that has no class assigned to it, but a class is needed to perform the operation. @author Richard Kirkby (rkirkby@cs.waikato.ac.nz) @version $Revision: 1.5 $

  public boolean setInputFormat(Instances instanceInfo) 
       throws Exception {


    super.setInputFormat(instanceInfo);
    if (instanceInfo.classIndex() < 0) {
      throw new UnassignedClassException("No class has been assigned to the instances");
    }
    setOutputFormat();
    m_Indices = null;
    if (instanceInfo.classAttribute().isNominal()) {
      return true;

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  public boolean setInputFormat(Instances instanceInfo) 
       throws Exception {


    super.setInputFormat(instanceInfo);
    if (instanceInfo.classIndex() < 0) {
      throw new UnassignedClassException("No class has been assigned to the instances");
    }
    setOutputFormat();
    m_Indices = null;
    if (instanceInfo.classAttribute().isNominal()) {
      return true;

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    FastVector setOfItemSets = new FastVector();
    ItemSet current;


    if(instances.classIndex() == -1)
      throw new UnassignedClassException("Class index is negative (not set)!");
    Attribute att = instances.classAttribute();
    for (int i = 0; i < instances.numAttributes(); i++) {
      if (instances.attribute(i).isNumeric())
  throw new Exception("Can't handle numeric attributes!");
      if(i != instances.classIndex()){

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  public boolean setInputFormat(Instances instanceInfo) 
       throws Exception {


    super.setInputFormat(instanceInfo);
    if (instanceInfo.classIndex() < 0) {
      throw new UnassignedClassException("No class has been assigned to the instances");
    }
    setOutputFormat();
    m_Indices = null;
    if (instanceInfo.classAttribute().isNominal()) {
      return true;

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Related Classes of weka.core.UnassignedClassException

weka.associations.CaRuleGeneration

weka.filters.supervised.attribute.NominalToBinary

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