Problem 233. Reverse the vector

Vishwanathan Iyer

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Reverse the vector elements.

Example:

 Input  x = [1,2,3,4,5,6,7,8,9] 
 Output y = [9,8,7,6,5,4,3,2,1]

Solve

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27870 Solutions

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Last Solution submitted on Feb 02, 2026

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9 Comments

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Ned Gulley on 2 Feb 2012

Added some more tests.

Nicholas Howe on 13 Apr 2012

Test set needs a column vector.

Kristin on 18 May 2012

As far as timing goes ...

x=rand(100,1);
tic;y=flipud(x);toc
Elapsed time is 0.068947 seconds.
tic;y=x(end:-1:1);toc
Elapsed time is 0.000026 seconds.

Muhammad M Sahari on 20 Dec 2016

innovative

Nicholas Bitler on 26 Nov 2020

thanks Kristin but I got it on my own

Roberto DADDA on 9 Dec 2020

I'm not understanding why sort(x, 'descend') is not correct. On matlab works.

Isabella Stellitano on 26 Oct 2021

GOOD

Gizem Deniz Akkas on 18 Apr 2022

function y = rev(x)
y=sort(x,'descend');
end

i'm doing like this but i have 1 assertion error ? what's wrong?

yuyuyu on 25 Apr 2025

"Iterate through the array from the last element to the first, decrementing the index by 1 in each iteration."

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