Examples of weka.core.DenseInstance

weka.core.DenseInstance
te empty instance with three attribute values
Instance inst = new DenseInstance(3);

// Set instance's values for the attributes "length", "weight", and "position"
inst.setValue(length, 5.3);
inst.setValue(weight, 300);
inst.setValue(position, "first");

// Set instance's dataset to be the dataset "race"
inst.setDataset(race);

// Print the instance
System.out.println("The instance: " + inst);
...

All methods that change an instance's attribute values are safe, ie. a change of an instance's attribute values does not affect any other instances. All methods that change an instance's attribute values clone the attribute value vector before it is changed. If your application heavily modifies instance values, it may be faster to create a new instance from scratch. @author Eibe Frank (eibe@cs.waikato.ac.nz) @version $Revision: 5987 $

      for (int i = incoming.numAttributes(); i < incoming.numAttributes()
          + (m_fieldsToForecast.size() * 2); i++) {
        values[i] = Utils.missingValue();
      }


      output = new DenseInstance(1.0, values);
    }
    output.setDataset(m_outgoingStructure);


    return output;
  }

View Full Code Here

  }


  @Override
  public void execute(Tuple input) {
    //Get the instance
    DenseInstance inst = (DenseInstance) input.getValue(0);
    INST_HEADERS = inst.dataset();
    
    //Retrieve the semaphore
    try {
      semaphore.acquire();
    } catch (InterruptedException e2) {

View Full Code Here

  @Override
  public void execute(Tuple input) {
    //Get the post
    Post newPost = (Post)input.getValue(0);
    //Turn it into an instance
    Instance inst = new DenseInstance(2);
    inst.setDataset(INST_HEADERS);
    inst.setValue(0, newPost.getTitle());
    inst.setValue(1, newPost.getSubReddit());
    //emit these to a new bolt that collects instances
    _collector.emit(new Values(inst));
    _collector.ack(input);
  }

View Full Code Here

         ArrayList<String> values = mapValues.get(strName);
         vals[j] = values.indexOf(strTemp);
            }


      // add
      data.add(new DenseInstance(1.0, vals));   
        }  
      
     
     //2.4. set class attribute
    for( Integer j = 0; j < u.n; j++) {

View Full Code Here

           
           vals[j++] = values.indexOf(d);    
          }
          
          // add
        data.add(new DenseInstance(1.0, vals));   
       }
    }
          
     //2.4. set class attribute
    int j = 0;

View Full Code Here

        vals[i] = values.indexOf(strData);
        i++;
      }
      
      // add
      data.add(new DenseInstance(1.0, vals));   
    }
    
    //2.4. set class attribute
      data.setClassIndex(data.numAttributes() - 3);

View Full Code Here

        assertEquals(0.0, result, .1);
    }
    
    private Instance createInstance(Instances dataset, Object... parameters)
    {
        Instance instance = new DenseInstance(5);
        instance.setDataset(dataset);
        for (int i=0; i<parameters.length; i++)
        {
            Object obj = parameters[i];
            if (obj instanceof Number)
            {
                instance.setValue(i, ((Number)obj).doubleValue());
            }
            else if (obj == Null.getValue())
            {
                instance.setMissing(i);
            }
            else 
            {
                instance.setValue(i, obj.toString());
            }
        }
        return instance;
    }

View Full Code Here

   * @param attrs list of attribute types of this entry
   * @param list  list of attribute values of this entry
   * @return
   */
  public static Instance newInstance(ArrayList<Attribute> attrs, Object ...list){
    Instance newInstance = new DenseInstance(list.length);
    
    Attribute att;
    for(int i=0; i<attrs.size(); i++){
         att = attrs.get(i);
         String listval = list[i].toString();


        // System.out.println(" ATTR. " + att + " VAL. " + listval);
         if(att.isNumeric()){
           try{  
             double dval = Double.parseDouble(listval);
             newInstance.setValue(att, dval );
           }catch(Exception ex){  }
         }
         else{
           try{
             newInstance.setValue(att, list[i].toString() );
           }catch(Exception e){
             e.printStackTrace();
           }  
         }
    }

View Full Code Here

   * @param inst instance to add
   * @return the new dataset
   */
  public  static Instances addInstance(Instances bb, Object ...list){
    
    Instance newInstance = new DenseInstance(list.length);
    
    Attribute att;
    for(int i=0; i<bb.numAttributes(); i++){
         att = bb.attribute(i);
         String listval = list[i].toString();


         //System.out.println(" ATTR. " + att + " VAL. " + listval);
         if(att.isNumeric()){
           try{  
             double dval = Double.parseDouble(listval);
             newInstance.setValue(att, dval );
           }catch(Exception ex){  }
         }
         else{
           try{
             newInstance.setValue(att, list[i].toString() );
           }catch(Exception e){
             e.printStackTrace();
           }  
         }
    }

View Full Code Here

       duration = (endTime - startTime)/1000F;
       
       System.out.println("\nElapsed time: "+(duration)+"sec");


      //test on instance
       Instance instance = new DenseInstance(4);
       instance.setValue(data.attribute("Abilities"), "pediatrician");
       instance.setValue(data.attribute("Dispositions"), "cautious");
       instance.setValue(data.attribute("Cross"), "female");
       instance.setDataset(data);
       
       classifier.testInstance(instance);
       
       System.out.println(instance);

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of weka.core.DenseInstance

com.deafgoat.ml.prognosticator.ARFFWriter

distributedRedditAnalyser.bolt.InstanceBolt

distributedRedditAnalyser.bolt.StringToWordVectorBolt

dkpro.similarity.ml.filters.LogFilter

etc.aloe.cscw2013.TrainingImplTest

etc.aloe.cscw2013.WekaModelTest

etc.aloe.data.ExampleSetTest

etc.aloe.data.SegmentSet

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.