Problem 641. Make a random, non-repeating vector.

Created by Doug Hull

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>This is a basic MATLAB operation. It is for instructional purposes.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><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>If you want to get a random permutation of integers</w:t></w:r><w:r><w:t> </w:t></w:r><w:hyperlink w:docLocation=\"http://www.mathworks.com/help/techdoc/ref/randperm.html\"><w:r><w:t>randperm</w:t></w:r></w:hyperlink><w:r><w:t> will help.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Given n, put the integers [1 2 3... N] in a random order.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Yes, the test suite is not conclusive, but it is pretty close!</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

9130 Solutions
6459 Solvers

Last Solution submitted on Feb 03, 2023

Last 200 Solutions

Problem Comments

Solution Comments

Solution 10018427

Solution 6811235

1 Comment

1 Comment

Josh Klueber on 2 Nov 2021

nice!

Solution 5671665

2 Comments

2 Comments

john perkins on 4 May 2021

good problem

Isabella Stellitano on 3 Nov 2021

good problem

Solution 5420650

1 Comment

1 Comment

TIMOTHY PIERGIOVANNI on 21 Apr 2021

randperm(n);

Solution 3205506

1 Comment

1 Comment

Muhammad Akmal Afibuddin Putra on 14 Oct 2020

thanks for the clue at description

Solution 2586403

1 Comment

1 Comment

Piero Cimule on 20 Jun 2020

vec = randperm(n);

Solution 1917732

1 Comment

1 Comment

Timothy Chavez on 31 Aug 2019

This solution seems to run correctly in MATLAB (desktop)... can anyone tell me why it is coming back with an "Assertion Failed"?

function vec = makeRandomOrdering(n)
vec = zeros(1, numel(n));
flags = zeros(1, numel(n));
index = 1;
while (sum(flags) ~= numel(n))
pos = randi(numel(n));
if (flags(pos) ~= 1)
vec(index) = n(pos);
index = index + 1;
flags(pos) = 1;
end
end
end

Problem Recent Solvers6459

Problem Tags

Community Treasure Hunt

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

Start Hunting!

Problem 641. Make a random, non-repeating vector.

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers6459

Suggested Problems

More from this Author51

Problem Tags

Community Treasure Hunt

Problem 641. Make a random, non-repeating vector.

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers6459

Suggested Problems

More from this Author51

Problem Tags

Community Treasure Hunt

Players