Create a distinct concept count feature specification

Produces a feature spec that counts the number of distinct concept IDs per person across all records in the table. Unlike other features, this operates across all concepts rather than per-concept.

Usage

omop.feature.n_distinct(concept_set = integer(0), name = NULL)

Arguments

concept_set

Numeric vector of concept IDs (default integer(0), meaning all concepts in the table).

name

Character; optional custom name for the feature column.

Value

An omop_feature_spec object with type = "n_distinct".

See also

ds.omop.plan.features, omop.feature.count

Examples

if (FALSE) { # \dontrun{
spec <- omop.feature.n_distinct()
plan <- ds.omop.plan.features(plan, "diversity",
  "condition_occurrence", specs = list(n_conditions = spec))
} # }