Problem 793. Combinations without using nchoosek

Created by Aurelien Queffurust

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>You have to generate a matrix with all possible combinations of n elements</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:b/></w:rPr><w:t>taken 2</w:t></w:r><w:r><w:t> at a time,</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:b/></w:rPr><w:t>without using nchoosek(1:n,2)</w:t></w:r><w:r><w:t> :</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=\"text\"/></w:pPr><w:r><w:t>if n = 3</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>output =</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[       1     2\n       1     3\n       2     3]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>if n = 5</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[output = \n\n       1     2\n       1     3\n       1     4\n       1     5\n       2     3\n       2     4\n       2     5\n       3     4\n       3     5\n       4     5]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Good luck!!</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

258 Solutions
117 Solvers

Last Solution submitted on Jan 27, 2023

Last 200 Solutions

Problem Comments

Solution Comments

Solution 1218493

1 Comment

1 Comment

Dyuman Joshi on 4 Dec 2020

Nice Approach!

Solution 784396

1 Comment

1 Comment

Deleted on 19 Nov 2021

lol

Solution 272333

1 Comment

1 Comment

Saurabh Harsh on 3 Oct 2013

so not cool!!

Problem Recent Solvers117

Problem Tags

Community Treasure Hunt

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

Start Hunting!

Problem 793. Combinations without using nchoosek

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers117

Suggested Problems

More from this Author30

Problem Tags

Community Treasure Hunt

Problem 793. Combinations without using nchoosek

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers117

Suggested Problems

More from this Author30

Problem Tags

Community Treasure Hunt

Players