Problem 109. Check if sorted

AMITAVA BISWAS

4K solvers

18 likes

Solve

Solve Later

Check if sorted.

Example:

 Input  x = [1 2 0]
 Output y is 0

Solve

Solution Stats

8681 Solutions

4496 Solvers

Last Solution submitted on May 04, 2026

Last 200 Solutions

Problem Comments

10 Comments

Show 7 older comments

Vivek on 30 May 2013

Sort means ascending or descending or both? Not clear

Geoffrey Akien on 7 Jul 2013

I agree! The code is significantly different for those possible cases.

Pascal Geschwill on 7 Jan 2014

Unfortunately, way too easy!

Matt Wolinsky on 10 Sep 2014

I agree it's not clear ... but
y = ~var(nonzeros(sign(diff(x))));
works for both ascending/descending cases.
(The test suite clarifies that ascending is the intended case)

Wang Yunhe on 16 Mar 2015

y = ~var(nonzeros(sign(diff(x)))); amazing~ ！nice idea

Sam Marshalik on 22 Jan 2016

There is a sort array command in MATLAB.

Muhammad M Sahari on 20 Dec 2016

if you are not familiar with array, will be difficult

Gan Wee Ting on 20 Dec 2016

nice

Jack Knoll on 6 Apr 2017

hehe

Georgios Stoumpis on 13 Jun 2017

The solution "y = issorted(x);" with a metric of 12 is not the leading solution. "Fair Play" is something unknown to cheaters!

Solution Comments

Show comments

Problem Recent Solvers4496

Problem Tags

Community Treasure Hunt

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

Start Hunting!