Problem 53. Duplicates

Created by Cody Team

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>Write a function that accepts a cell array of strings and returns another cell array of strings</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:b/></w:rPr><w:t>with only the duplicates</w:t></w:r><w:r><w:t> retained.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Examples:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[ Input  strs = {'a','b','a'}\n Output dups is 'a'\n\n Input  strs = {'a','b','c'}\n Output dups is Empty cell array: 0-by-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

2618 Solutions
1178 Solvers

Last Solution submitted on Feb 24, 2021

Last 200 Solutions

Problem Comments

4 Comments

4 Comments

Show 1 older comment

Jean-Marie Sainthillier on 24 May 2014

Why not just an isequal(correct,result) in the tests?
Consequently, a lot of solutions leave duplicates in the result.

Erik Zdansky on 7 Feb 2016

How should higher multiplets be treated?

mehmet muhammet cesur on 8 Jun 2020

güzell

Ahmed Nazir on 1 Oct 2020

Useful function => unique, countcats, categorical

Solution:
https://github.com/AhmedNazir/MatlabCody/blob/master/duplicates.m

Solution Comments

Solution 3013117

1 Comment

1 Comment

Ahmed Nazir on 1 Oct 2020

https://github.com/AhmedNazir/MatlabCody/blob/master/duplicates.m

Solution 399839

1 Comment

1 Comment

Pascal Geschwill on 20 Mar 2014

That's cheating :D

Solution 73896

1 Comment

1 Comment

Steffen Zelzer on 31 Jan 2018

This doesn't need the first line of code at all ...

Solution 6732

3 Comments

3 Comments

@bmtran (Bryant Tran) on 26 Jan 2012

ah, i didn't realize that you could leave duplicates in the final result and still have it pass the test cases; nicely done

Dyuman Joshi on 28 Nov 2020

This is indeed a very good solution!

Rik on 14 Jan 2021

There should probably be a test to detect this.

Problem Recent Solvers1178

Problem Tags

matlab sets strings

Community Treasure Hunt

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

Start Hunting!

Problem 53. Duplicates

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1178

Suggested Problems

More from this Author95

Problem Tags

Community Treasure Hunt

Problem 53. Duplicates

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1178

Suggested Problems

More from this Author95

Problem Tags

Community Treasure Hunt

Players