/// <summary>
/// Create an instance of <see cref="PredictionFunction{TSrc, TDst}"/>.
/// </summary>
/// <param name="env">The host environment.</param>
/// <param name="transformer">The model (transformer) to use for prediction.</param>
public PredictionFunction(IHostEnvironment env, ITransformer transformer)
{
Contracts.CheckValue(env, nameof(env));
env.CheckValue(transformer, nameof(transformer));
IDataView dv = env.CreateDataView(new TSrc[0]);
_engine = env.CreatePredictionEngine <TSrc, TDst>(transformer);
}
public PredictionEngineExample(string modelName)
{
_env = EnvHelper.NewTestEnvironment();
var view = DataViewConstructionUtils.CreateFromEnumerable(_env, new FloatVectorInput[] { });
var pipe = DataViewConstructionUtils.LoadPipeWithPredictor(_env, File.OpenRead(modelName),
new EmptyDataView(_env, view.Schema));
var transformer = new TransformWrapper(_env, pipe);
_predictor = _env.CreatePredictionEngine <FloatVectorInput, FloatOutput>(transformer);
}
public MyPredictionEngine(IHostEnvironment env, ITransformer pipe)
{
IDataView dv = env.CreateDataView(new TSrc[0]);
_engine = env.CreatePredictionEngine <TSrc, TDst>(pipe.Transform(dv));
}