for (String fieldToPredict : fieldsToPredict.keySet()) {
List<PredictionResult> results = fieldsToPredict.get(fieldToPredict);
Score[][] combined_score = new Score[nTestDocs][nTrainDocs];
for (int i = 0; i < nTestDocs; ++i) {
for (int j = 0; j < nTrainDocs; ++j) {
combined_score[i][j] = new Score();
}
}
for (int i = 0; i < nTrainDocs; ++i) {
for (int j = 0; j < nTestDocs; ++j) {