public Transform(IHostEnvironment env, IDataView input, string labelCol, string scoreCol, string groupCol,
int truncationLevel, Double[] labelGains)
: base(env, input, labelCol, scoreCol, groupCol, RegistrationName)
{
Host.CheckParam(0 < truncationLevel, nameof(truncationLevel),
"Truncation level must be greater than 0");
Host.CheckValue(labelGains, nameof(labelGains));
_truncationLevel = truncationLevel;
_discountMap = RankingUtils.GetDiscountMap(_truncationLevel);
_labelGains = labelGains;
_bindings = new Bindings(Host, Source.Schema, true, LabelCol, ScoreCol, GroupCol, _truncationLevel);
}
public Counters(Double[] labelGains, int truncationLevel, bool groupSummary)
{
Contracts.Assert(truncationLevel > 0);
Contracts.AssertValue(labelGains);
TruncationLevel = truncationLevel;
_discountMap = RankingUtils.GetDiscountMap(truncationLevel);
_sumDcgAtN = new Double[TruncationLevel];
_sumNdcgAtN = new Double[TruncationLevel];
_groupDcgCur = new Double[TruncationLevel];
_groupMaxDcgCur = new Double[TruncationLevel];
if (groupSummary)
{
_groupNdcg = new List <Double[]>();
_groupDcg = new List <Double[]>();
_groupMaxDcg = new List <Double[]>();
}
_queryLabels = new List <short>();
_queryOutputs = new List <Single>();
_labelGains = labelGains;
}