Problem 1024. Doubling elements in a vector

Created by Abdelhak ARESMOUK

Solve Later

{"relationships":[{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/document","relationshipId":"rId1","target":"/matlab/document.xml"},{"relationshipType":"http://schemas.mathworks.com/matlab/code/2013/relationships/output","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\"?><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>Given the vector A, return B in which all numbers in A are doubling. So for:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>A = [ 1 5 8 ]</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>then</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/><w:jc w:val=\"left\"/></w:pPr><w:r><w:t>B = [ 1 1 5 5 8 8 ]</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

4816 Solutions
2178 Solvers

Last Solution submitted on Dec 02, 2020

Last 200 Solutions

Problem Comments

3 Comments

3 Comments

srisai vangara on 29 Apr 2020

Really found a lot of trouble to find the solution.
But could not find how someone could solve it just using a size of 7.

Sivaramarao B on 7 Jun 2020

good one

Kaiz Merchant on 4 Aug 2020

What matlab functions are useful for this ? (I did it with a loop)

Solution Comments

Solution 2589328

1 Comment

1 Comment

Piero Cimule on 20 Jun 2020

B=[]
for i=1:length(A)
for j=1:2
B(end+1)=A(i);
end
end

Solution 2513921

1 Comment

1 Comment

Batuhan CELIK on 10 Jun 2020

@ivan lyss Could you help me How solved this problam

Solution 1936856

3 Comments

3 Comments

Uchechukwu Obimma on 9 May 2020

Please, I need your help to solve this problem, ChanXy.

Umur Ulas Harman on 25 Jun 2020

function B = your_fcn_name(A)
B=repelem(A,2);
end

HARSH RAITHATHA on 9 Nov 2020 at 12:24

A=A'
r=repmat(A,1,2)'
B=r(:)'

Problem Recent Solvers2178

Problem Tags

iteration loop vector

Community Treasure Hunt

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

Start Hunting!

Problem 1024. Doubling elements in a vector

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers2178

Suggested Problems

More from this Author2

Problem Tags

Community Treasure Hunt

Problem 1024. Doubling elements in a vector

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers2178

Suggested Problems

More from this Author2

Problem Tags

Community Treasure Hunt

Players