Remove Duplicate Combinations (Order-Invariant)
Arguments
- combn
A two-column matrix where each row is a pairwise combination.
Value
A logical vector indicating whether each row is a unique (order-insensitive) combination.
Details
Given a matrix of combinations (e.g., from `combn()`), this function removes duplicates where row elements are identical up to ordering.
Examples
combn_mat <- matrix(c(1,2,2,1,3,4), ncol = 2, byrow = TRUE)
unique_flags <- combn_dedup(combn_mat)
print(unique_flags)
#> [1] TRUE FALSE TRUE