Function group_temporal_join

pub fn group_temporal_join(
    trajectories: &[(u64, &[(i64, &[f32])])],
    epsilon: f32,
    min_entities: usize,
    window_us: i64,
) -> Result<Vec<GroupJoinResult>, AnalyticsError>

Find time windows where at least min_entities from the group converge.

For each window, computes all pairwise distances and finds the largest subset within distance epsilon of each other.

Arguments

• trajectories — (entity_id, trajectory) pairs
• epsilon — Maximum distance threshold
• min_entities — Minimum number of entities that must converge
• window_us — Sliding window size in microseconds

Errors

Returns AnalyticsError::InsufficientData if fewer than min_entities trajectories are provided.