public CompositeDataReader(IDataReader <TSource> reader, TransformerChain <TLastTransformer> transformerChain = null)
{
Contracts.CheckValue(reader, nameof(reader));
Contracts.CheckValueOrNull(transformerChain);
Reader = reader;
Transformer = transformerChain ?? new TransformerChain <TLastTransformer>();
}
public CategoricalTransform(ValueToKeyMappingEstimator term, IEstimator <ITransformer> toVector, IDataView input)
{
if (toVector != null)
{
_transformer = term.Append(toVector).Fit(input);
}
else
{
_transformer = new TransformerChain <ITransformer>(term.Fit(input));
}
}
public CategoricalTransform(TermEstimator term, IEstimator <ITransformer> toVector, IDataView input)
{
var chain = term.Append(toVector);
_transformer = chain.Fit(input);
}
internal CategoricalHashTransform(HashingEstimator hash, IEstimator <ITransformer> keyToVector, IDataView input)
{
var chain = hash.Append(keyToVector);
_transformer = chain.Fit(input);
}