How to use

LabeledPoint

in

ml.dmlc.xgboost4j

LabeledPoint labeledPoint = base.next();
batch.add(labeledPoint);
numElem += labeledPoint.values().length;
numRows++;
LabeledPoint labeledPoint = batch.get(i);
rowOffset[i] = offset;
label[i] = labeledPoint.label();
weight[i] = labeledPoint.weight();
if (labeledPoint.indices() != null) {
 System.arraycopy(labeledPoint.indices(), 0, featureIndex, offset,
     labeledPoint.indices().length);
} else {
 for (int j = 0; j < labeledPoint.values().length; j++) {
  featureIndex[offset + j] = j;
System.arraycopy(labeledPoint.values(), 0, featureValue, offset,
    labeledPoint.values().length);
offset += labeledPoint.values().length;

/** Transform List<String> inputs into a XGBoost input format */
@Nullable
public static LabeledPoint parseFeatures(final double target,
    @Nonnull final String[] features) {
  final int size = features.length;
  if (size == 0) {
    return null;
  }
  final int[] indices = new int[size];
  final float[] values = new float[size];
  for (int i = 0; i < size; i++) {
    if (features[i] == null) {
      continue;
    }
    final String str = features[i];
    final int pos = str.indexOf(':');
    if (pos >= 1) {
      indices[i] = Integer.parseInt(str.substring(0, pos));
      values[i] = Float.parseFloat(str.substring(pos + 1));
    }
  }
  return new LabeledPoint((float) target, indices, values);
}

LabeledPoint labeledPoint = base.next();
batch.add(labeledPoint);
numElem += labeledPoint.values().length;
numRows++;
LabeledPoint labeledPoint = batch.get(i);
rowOffset[i] = offset;
label[i] = labeledPoint.label();
weight[i] = labeledPoint.weight();
if (labeledPoint.indices() != null) {
 System.arraycopy(labeledPoint.indices(), 0, featureIndex, offset,
     labeledPoint.indices().length);
} else {
 for (int j = 0; j < labeledPoint.values().length; j++) {
  featureIndex[offset + j] = j;
System.arraycopy(labeledPoint.values(), 0, featureValue, offset,
    labeledPoint.values().length);
offset += labeledPoint.values().length;

LabeledPoint labeledPoint = base.next();
batch.add(labeledPoint);
numElem += labeledPoint.values().length;
numRows++;
LabeledPoint labeledPoint = batch.get(i);
rowOffset[i] = offset;
label[i] = labeledPoint.label();
weight[i] = labeledPoint.weight();
if (labeledPoint.indices() != null) {
 System.arraycopy(labeledPoint.indices(), 0, featureIndex, offset,
     labeledPoint.indices().length);
} else {
 for (int j = 0; j < labeledPoint.values().length; j++) {
  featureIndex[offset + j] = j;
System.arraycopy(labeledPoint.values(), 0, featureValue, offset,
    labeledPoint.values().length);
offset += labeledPoint.values().length;