Problem 233. Reverse the vector

Created by Vishwanathan Iyer

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","targetMode":"","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","targetMode":"","relationshipId":"rId2","target":"/matlab/output.xml"}],"parts":[{"partUri":"/matlab/document.xml","relationship":[],"contentType":"application/vnd.mathworks.matlab.code.document+xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<w:document xmlns:w=\"http://schemas.openxmlformats.org/wordprocessingml/2006/main\"><w:body><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Reverse the vector elements.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Example:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ Input  x = [1,2,3,4,5,6,7,8,9] \n Output y = [9,8,7,6,5,4,3,2,1]]]></w:t></w:r></w:p></w:body></w:document>"},{"partUri":"/matlab/output.xml","contentType":"text/xml","content":"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"no\" ?><embeddedOutputs><metaData><evaluationState>manual</evaluationState><layoutState>code</layoutState><outputStatus>ready</outputStatus></metaData><outputArray type=\"array\"/><regionArray type=\"array\"/></embeddedOutputs>"}]}

Solve

Solution Stats

18124 Solutions
10533 Solvers

Last Solution submitted on Feb 03, 2023

Last 200 Solutions

Problem Comments

8 Comments

8 Comments

Show 5 older comments

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?

Solution Comments

Solution 10211887

1 Comment

1 Comment

DEBDATTA BHUNIA on 29 Dec 2022

good one

Solution 10122632

1 Comment

1 Comment

Adler on 12 Dec 2022

Easy!

Solution 9998907

1 Comment

1 Comment

Caitlin on 6 Dec 2022

So easy, use flip command

Solution 6810830

1 Comment

1 Comment

Josh Klueber on 2 Nov 2021

good problem

Solution 6734908

1 Comment

1 Comment

Suhas Kadalagere Sampath on 20 Oct 2021

good one

Solution 5918270

1 Comment

1 Comment

Mouhamed Niasse on 7 Jun 2021

https://www.mathworks.com/help/matlab/ref/flip.html

Solution 5667115

1 Comment

1 Comment

john perkins on 4 May 2021

nice

Solution 5152353

1 Comment

1 Comment

Selahattin Alan on 23 Mar 2021

easy

Solution 3575770

Solution 3034798

1 Comment

1 Comment

Tatjana Dulinskiene on 2 Oct 2020

easy

Solution 2289798

1 Comment

1 Comment

Edward Vaughn on 17 May 2020

I see I'm going to have to memorize a lot of this syntax to make my life easier.

Solution 1885342

1 Comment

1 Comment

Ashish Khulbey on 27 Jul 2019

This link can help:
https://in.mathworks.com/help/matlab/ref/fliplr.html

Solution 1730215

Solution 1101193

1 Comment

1 Comment

Yoshimasa Nakatani on 10 Jan 2017

I did it!
(^^)v

Solution 1094317

1 Comment

1 Comment

TAYALAN SIVALINGAM on 29 Dec 2016

Solution 1024425

1 Comment

1 Comment

Ian Harrison on 20 Oct 2016

Errors in the test suite.

Solution 997251

1 Comment

1 Comment

David Verrelli on 3 Sep 2018

This user (mohamed elbesealy) appears to have gamed the system, with fraudulent "likes" of this unremarkable solution submitted by 'sock-puppet' accounts. —DIV

Solution 832503

1 Comment

1 Comment

Pooja Narayan on 19 Feb 2016

Never knew about rot90. I did, y = x(length(x):-1:1) and the size was 19! Learnt something new..

Solution 788174

1 Comment

1 Comment

Alexey Sinitsin on 4 Dec 2015

That was easy

Solution 441189

1 Comment

1 Comment

Joseph Pauwels on 10 May 2014

we had a similar problem in my class

Solution 392029

1 Comment

1 Comment

Ufuk Tamer on 27 Jan 2014

easy one

Solution 242508

1 Comment

1 Comment

hanciong on 10 May 2013

how to make the code even shorter than this???

Solution 105761

1 Comment

1 Comment

li haitao on 14 Nov 2012

helpfull!

Solution 76025

1 Comment

1 Comment

Nicholas Howe on 13 Apr 2012

Test set needs a column vector.

Problem Recent Solvers10533

Problem Tags

Community Treasure Hunt

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

Start Hunting!

Problem 233. Reverse the vector

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers10533

Suggested Problems

More from this Author1

Problem Tags

Community Treasure Hunt

Problem 233. Reverse the vector

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers10533

Suggested Problems

More from this Author1

Problem Tags

Community Treasure Hunt

Players