public ValueMapper <TIn, TOut, TDist> GetMapper <TIn, TOut, TDist>()
{
Host.Check(typeof(TIn) == typeof(VBuffer <Single>));
Host.Check(typeof(TOut) == typeof(Single));
Host.Check(typeof(TDist) == typeof(Single));
var combine = Combiner.GetCombiner();
var combineProb = _probabilityCombiner.GetCombiner();
var maps = GetMaps();
var predictions = new Single[_mappers.Length];
var probabilities = new Single[_mappers.Length];
var vBuffers = new VBuffer <Single> [_mappers.Length];
ValueMapper <VBuffer <Single>, Single, Single> del =
(ref VBuffer <Single> src, ref Single score, ref Single prob) =>
{
if (InputType.VectorSize > 0)
{
Host.Check(src.Length == InputType.VectorSize);
}
var tmp = src;
Parallel.For(0, maps.Length, i =>
{
var model = Models[i];
if (model.SelectedFeatures != null)
{
EnsembleUtils.SelectFeatures(ref tmp, model.SelectedFeatures, model.Cardinality, ref vBuffers[i]);
maps[i](ref vBuffers[i], ref predictions[i], ref probabilities[i]);
}
else
{
maps[i](ref tmp, ref predictions[i], ref probabilities[i]);
}
});
combine(ref score, predictions, _averagedWeights);
combineProb(ref prob, probabilities, _averagedWeights);
};
return((ValueMapper <TIn, TOut, TDist>)(Delegate) del);
}
