sinkhorn_to_assignment: Round 'Sinkhorn' transport plan to hard assignment

In couplr: Optimal Pairing and Matching via Linear Assignment

Round 'Sinkhorn' transport plan to hard assignment

Description

Convert a soft transport plan from sinkhorn() to a hard 1-to-1 assignment using greedy rounding.

Usage

sinkhorn_to_assignment(result)

Arguments

result

Either a result from sinkhorn() or a transport plan matrix.

Details

Greedy rounding iteratively assigns each row to its most probable column, ensuring no column is assigned twice. This may not give the globally optimal hard assignment; for that, use the transport plan as a cost matrix with assignment().

Value

Integer vector of column assignments (1-based), same format as assignment().

See Also

sinkhorn()

Examples

cost <- matrix(c(1, 2, 3, 4, 5, 6, 7, 8, 9), nrow = 3, byrow = TRUE)
result <- sinkhorn(cost, lambda = 20)
hard_match <- sinkhorn_to_assignment(result)
print(hard_match)

couplr documentation built on Jan. 20, 2026, 5:07 p.m.