protected void saveInstances(Instances instances, File outputFile) {
try {
CSVSaver saver = new CSVSaver();
saver.setFile(outputFile);
saver.setInstances(instances);
saver.writeBatch();
System.out.println("Saved instances to " + outputFile);
} catch (IOException e) {
System.err.println("Error writing instances to " + outputFile);
System.err.println("\t" + e.getMessage());
}