public static void toLibSVM(List<TrainingSample<BxZoneLabel>> trainingElements, String filePath)
throws IOException {
BufferedWriter svmDataFile = null;
try {
FileWriter fstream = new FileWriter(filePath);
svmDataFile = new BufferedWriter(fstream);
for (TrainingSample<BxZoneLabel> elem : trainingElements) {
if (elem.getLabel() == null) {
continue;
}
svmDataFile.write(String.valueOf(elem.getLabel().ordinal()));
svmDataFile.write(" ");
Integer featureCounter = 1;
for (Double value : elem.getFeatureVector().getValues()) {
StringBuilder sb = new StringBuilder();
Formatter formatter = new Formatter(sb, Locale.US);
formatter.format("%d:%.5f", featureCounter++, value);
svmDataFile.write(sb.toString());
svmDataFile.write(" ");
}
svmDataFile.write("\n");
}
svmDataFile.close();
} catch (Exception e) {
System.err.println("Error: " + e.getMessage());
return;
} finally {
if (svmDataFile != null) {
svmDataFile.close();
}
}
System.out.println("Done.");
}
public static void toLibSVM(
TrainingSample<BxZoneLabel> trainingElement, BufferedWriter fileWriter) throws IOException {
if (trainingElement.getLabel() == null) {
return;
}
fileWriter.write(String.valueOf(trainingElement.getLabel().ordinal()));
fileWriter.write(" ");
Integer featureCounter = 1;
for (Double value : trainingElement.getFeatureVector().getValues()) {
StringBuilder sb = new StringBuilder();
Formatter formatter = new Formatter(sb, Locale.US);
formatter.format("%d:%.5f", featureCounter++, value);
fileWriter.write(sb.toString());
fileWriter.write(" ");
}
fileWriter.write("\n");
}