Problem 38. Return a list sorted by number of occurrences

Created by Cody Team

Solve Later

Given a vector x, return a vector y of the unique values in x sorted by the number of occurrences in x.

Ties are resolved by a sort from lowest to highest.

So if

 x = [1 2 2 2 3 3 7 7 93]

then

 y = [2 3 7 1 93]

Solve

Solution Stats

3024 Solutions
1243 Solvers

Last Solution submitted on Jan 21, 2020

Last 200 Solutions

Problem Comments

1 Comment

1 Comment

Chul Min Yeum on 3 Jan 2020 at 12:03

Good problem!

Solution Comments

Solution 580317

1 Comment

1 Comment

Ionut Barbu on 13 Aug 2017

this type of hack solutions should be banned

Solution 493731

1 Comment

1 Comment

Jonathan on 29 Aug 2014

The behavior of accumarray has changed. In R2012b, I used I = accumarray(I.', 1); and it worked. I had to remove the transpose to pass the test suite.

Solution 246301

1 Comment

1 Comment

Clemens Giegerich on 19 May 2013

Interesting cody behavior by masking anonymous functions with str2num...

Solution 177297

1 Comment

1 Comment

Baalzamon on 14 Dec 2012

Test Suite having a hissy fit because it wanted a col not a row o_O

Problem Recent Solvers1243

Problem Tags

sorting vectors