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

2899 Solutions
1920 Solvers

Last Solution submitted on Sep 23, 2020

Last 200 Solutions

Problem Comments

Solution Comments

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 Solvers1920

Problem Tags

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

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1920

Suggested Problems

More from this Author52

Problem Tags

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

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers1920

Suggested Problems

More from this Author52

Problem Tags

Players