public override void Train(Split split)
{
UpdateFeatureBuilder(split);
List <string> train = split.Train.Select(f => FeatureBuilder.GetLibFmFeatureVector(f)).ToList();
_libFm.CreateTrainSet(train, split.Container.MinTarget, split.Container.MaxTarget,
FeatureBuilder.GetNumMappedValues(), FeatureBuilder.Mapper.NumberOfEntities);
Logger.Current.Trace("Training with LibFm recommender...");
PureTrainTime = (int)Wrap.MeasureTime(delegate()
{
_libFm.Train();
}).TotalMilliseconds;
}