Problem 43975. Permute the unique values of a vector without sorting

Given a vector A, return the matrix B, wherein each row contains a permutation of the unique values in original vector while retaining the original order of A. Permutations should operate on repeated numbers in indexed order.
For example, if A = [2 5 3 4 2 1 3], the function should return:
[2 5 3 4 1;
2 5 4 1 3;
5 3 4 2 1;
5 4 2 1 3]
This result is due to two repeated values: 2, at indices 1 & 5 and 3, at indices 3 & 7. The permutations of repeated numbers to include are then:
1 3 (i.e., remove elements at indices 5 & 7, resulting in [2 5 3 4 1])
1 7 (i.e., remove elements at indices 3 & 5, resulting in [2 5 4 1 3])
5 3 (i.e., remove elements at indices 1 & 7, resulting in [5 3 4 2 1])
5 7 (i.e., remove elements at indices 1 & 3, resulting in [5 4 2 1 3])

Solution Stats

44.26% Correct | 55.74% Incorrect
Last Solution submitted on Feb 19, 2024

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers15

Suggested Problems

More from this Author3

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!