public static void testCV(DataFileReader ip) {
try {
Instances dataSet = ip.loadDataFromFile();
MinMaxNormalizer minMaxNorm = new MinMaxNormalizer();
ConfusionMatrix averageConfusionMatrix = new ConfusionMatrix();
int crossValidation = 10;
for (int i = 1; i <= crossValidation; i++) {
Instances train = dataSet.getTrainingForCrossValidation(crossValidation, i);
Instances test = dataSet.getTestForCrossValidation();
test = test.normalize(minMaxNorm);
train = train.normalize(minMaxNorm);
KNearestNeighbor kNNClassifier = new KNearestNeighbor(train);
kNNClassifier.kNNClassify(test);
ConfusionMatrix cm = new ConfusionMatrix();
for (int j = 0; j < test.getDataSetSize(); j++) {
Instance t = test.getInstance(j);
if (t.isCorrectClassified()) {
// true
if (t.getClassValue() == 1) {
// positive
cm.incrementTruePositive();
} else {
// negative
cm.incrementTrueNegative();
}
} else {
// false
if (t.getClassValue() == 1) {
// positive
cm.incrementFalsePositive();
} else {
// negative
cm.incrementFalseNegative();
}
}
}
averageConfusionMatrix.addToTruePositive(cm.getTruePositive());
averageConfusionMatrix.addToFalsePositive(cm.getFalsePositive());
averageConfusionMatrix.addToTrueNegative(cm.getTrueNegative());
averageConfusionMatrix.addToFalseNegative(cm.getFalseNegative());
}
System.out.format("\t Average Accuracy %f \n", averageConfusionMatrix.getAccuracy());
System.out.format("\t Average Precision %f \n", averageConfusionMatrix.getPrecision());
System.out.format("\t Average Recall %f \n", averageConfusionMatrix.getRecall());
System.out.format("\t Average F-Measure %f \n", averageConfusionMatrix.getFmeasure());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
