/// <summary>
/// Creates a default data scorer appropriate to the predictor's prediction kind.
/// </summary>
/// <param name="env">The host environment to use.</param>
/// <param name="data">The data to score.</param>
/// <param name="predictor">The predictor to score.</param>
/// <param name="trainSchema">The training data schema from which the scorer can optionally extract
/// additional information, e.g., label names. If this is <c>null</c>, no information will be
/// extracted.</param>
/// <returns>The scored data.</returns>
public static IDataScorerTransform CreateDefaultScorer(this IHostEnvironment env, RoleMappedData data,
Predictor predictor, RoleMappedSchema trainSchema = null)
{
Contracts.CheckValue(env, nameof(env));
env.CheckValue(data, nameof(data));
env.CheckValue(predictor, nameof(predictor));
env.CheckValueOrNull(trainSchema);
return(ScoreUtils.GetScorer(predictor.Pred, data, env, trainSchema));
}
/// <summary>
/// Creates a data scorer from the 'LoadName{settings}' string.
/// </summary>
/// <param name="env">The host environment to use.</param>
/// <param name="settings">The settings string.</param>
/// <param name="data">The data to score.</param>
/// <param name="predictor">The predictor to score.</param>
/// <param name="trainSchema">The training data schema from which the scorer can optionally extract
/// additional information, e.g., label names. If this is <c>null</c>, no information will be
/// extracted.</param>
/// <returns>The scored data.</returns>
public static IDataScorerTransform CreateScorer(this IHostEnvironment env, string settings,
RoleMappedData data, Predictor predictor, RoleMappedSchema trainSchema = null)
{
Contracts.CheckValue(env, nameof(env));
env.CheckValue(data, nameof(data));
env.CheckValue(predictor, nameof(predictor));
env.CheckValueOrNull(trainSchema);
ICommandLineComponentFactory scorerFactorySettings = ParseScorerSettings(settings);
var bindable = ScoreUtils.GetSchemaBindableMapper(env, predictor.Pred, scorerFactorySettings: scorerFactorySettings);
var mapper = bindable.Bind(env, data.Schema);
return(CreateCore <IDataScorerTransform, SignatureDataScorer>(env, settings, data.Data, mapper, trainSchema));
}
