private static void writeArffHeader(DataSet dataSet, String outputFile) {
MLAssignmentUtils.writeToFile(outputFile, "@Relation RCATransformed\n", false);
Vector vector = dataSet.get(0).getData();
for (int i = 0; i < vector.size(); i++) {
MLAssignmentUtils.writeToFile(outputFile, "@attribute attr" + (i + 1) + " numeric\n", true);
}
MLAssignmentUtils.writeToFile(outputFile, "@data\n", true);
}
private static String getLabel(Instance label, List<String> labels) {
Vector vector = label.getData();
for (int i = 0; i < vector.size(); i++) {
if (vector.get(i) == 1) {
return labels.get(i);
}
}
throw new RuntimeException("No label with value found");
}
private static void saveAsArff(DataSet dataSet, String outputFile, List<String> labels) {
writeArffHeader(dataSet, outputFile);
Instance[] instances = dataSet.getInstances();
for (Instance instance : instances) {
Vector vector = instance.getData();
for (int i = 0; i < vector.size(); i++) {
MLAssignmentUtils.writeToFile(outputFile, String.valueOf(vector.get(i)) + ",", true);
}
MLAssignmentUtils.writeToFile(outputFile, getLabel(instance.getLabel(), labels) + "\n", true);
}
}
