Problem 44401. Vertical matrix sort

Given a matrix x with n rows and m columns, return a matrix y with 2n rows and m columns, such that every column in x is sorted from low to high and then from high to low.

Example:

x = 8  9  3  9
    9  6  5  2
    2  1  9  9

y = 2  1  3  2
    8  6  5  9
    9  9  9  9
    9  9  9  9
    8  6  5  9
    2  1  3  2
Solve

Solution Stats

21.8% Correct | 78.2% Incorrect
Last Solution submitted on Dec 15, 2025

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers336

Suggested Problems

More from this Author25

Problem Tags

22105 matrices sort

Community Treasure Hunt

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

Start Hunting!