internal LightGbmBinaryTrainer(IHostEnvironment env, Options options)
: base(env, LoadNameValue, options, TrainerUtils.MakeBoolScalarLabel(options.LabelColumnName))
{
Contracts.CheckUserArg(options.Sigmoid > 0, nameof(Options.Sigmoid), "must be > 0.");
Contracts.CheckUserArg(options.WeightOfPositiveExamples > 0, nameof(Options.WeightOfPositiveExamples), "must be > 0.");
}
public static CommonOutputs.BinaryClassificationOutput TrainBinary(IHostEnvironment env, Options input)
{
Contracts.CheckValue(env, nameof(env));
var host = env.Register("TrainLightGBM");
host.CheckValue(input, nameof(input));
EntryPointUtils.CheckInputArgs(host, input);
return(TrainerEntryPointsUtils.Train <Options, CommonOutputs.BinaryClassificationOutput>(host, input,
() => new LightGbmBinaryClassificationTrainer(host, input),
getLabel: () => TrainerEntryPointsUtils.FindColumn(host, input.TrainingData.Schema, input.LabelColumnName),
getWeight: () => TrainerEntryPointsUtils.FindColumn(host, input.TrainingData.Schema, input.ExampleWeightColumnName)));
}
internal LightGbmBinaryClassificationTrainer(IHostEnvironment env, Options options)
: base(env, LoadNameValue, options, TrainerUtils.MakeBoolScalarLabel(options.LabelColumnName))
{
}
internal LightGbmMulticlassTrainer(IHostEnvironment env, Options options)
: base(env, LoadNameValue, options, TrainerUtils.MakeU4ScalarColumn(options.LabelColumnName))
{
Contracts.CheckUserArg(options.Sigmoid > 0, nameof(Options.Sigmoid), "must be > 0.");
_numClass = -1;
}