stats/sampling_utils library

Sampling helpers (stratified, systematic) — roadmap #584.

Functions

stratifiedSampleIndices(List<Object?> strata, int perGroup, [Random? random]) → List<int>

Stratified: strata gives group id per index; sample perGroup from each.

systematicSample<T>(List<T> list, int step, {int start = 0}) → List<T>

Systematic sampling: take every step-th element starting at start.