This function is usually used to assess the quality of ranking.
The calculation of this function consists of the following steps:
Filter out all objects with negative predicted relevancies ().
The FilteredDCG metric is calculated for each group () with filtered objects.
The calculation principle depends on the specified value of the
type/denominator LogPosition Position Base Exp
is the label value for the i-th object in the group after filtering objects with negative predicted relevancies.
The aggregated value of the metric for all groups is calculated as follows:
Metric calculation principles.
Metric denominator type.