!752

// java ml and dependencies
lib 1002535
lib 1002536
lib 1002537
lib 1002538
lib 1002539
lib 1002540

import net.sf.javaml.classification.*;
import net.sf.javaml.core.*;
import net.sf.javaml.tools.data.*;

p {
  File irisCSV = loadLibrary("#1002541");
  
  /* Load a data set */
  
  Dataset data = FileHandler.loadDataset(irisCSV, 4, ",");
  
  /* Construct a KNN classifier that uses 5 neighbors to make a
   * decision. */
   
  Classifier knn = new KNearestNeighbors(5);
  knn.buildClassifier(data);
  
  Dataset dataForClassification = FileHandler.loadDataset(irisCSV, 4, ",");
  
  /* Counters for correct and wrong predictions. */
  int correct = 0, wrong = 0;
  /* Classify all instances and check with the correct class values */
  for (Instance inst : dataForClassification) {
      Object predictedClassValue = knn.classify(inst);
      Object realClassValue = inst.classValue();
      if (predictedClassValue.equals(realClassValue))
          correct++;
      else
          wrong++;
  }
  
  print("correct=" + correct + ", wrong=" + wrong);
}