Problem 1971. Remove element(s) from cell array

Created by J-G van der Toorn

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 can easily remove an element (or a column in any dimension) from a normal matrix, but assigning that value (or range) empty. For example</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[A = 1:10\nA(5) = []]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>results in</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[1 2 3 4 6 7 8 9 10]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>You task is to find the shortest, elegant, way in Matlab to do the same for cell arrays. Regexp, eval, and other workarounds that trick mtree are considered stupid, and will not be appreciated.</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

1286 Solutions
499 Solvers

Last Solution submitted on May 07, 2021

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

源樹上林 on 22 Aug 2020

good

Yunpeng Teng on 5 Dec 2020

you should add that the element is deleted by the index not the value

Solution Comments

Solution 5681325

1 Comment

1 Comment

john perkins on 4 May 2021 at 3:40

very challengning

Solution 4601355

1 Comment

1 Comment

Qin-Yong on 15 Jan 2021

function y = remove_from_cell_array(x,to_remove)
x(to_remove)=[];
y=x;
end

Solution 2674019

1 Comment

1 Comment

Matthias Saurer on 10 Jul 2020

you should also add a test suit where the individual elements are not increasing monotonously, e.g. x={9,4,5,8,3,1,6,4}

Solution 2673863

1 Comment

1 Comment

Matthias Saurer on 9 Jul 2020

that was a nice one :))

Problem Recent Solvers499

Problem Tags

cell arrays remove

Community Treasure Hunt

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

Start Hunting!

Problem 1971. Remove element(s) from cell array

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers499

Suggested Problems

More from this Author31

Problem Tags

Community Treasure Hunt

Problem 1971. Remove element(s) from cell array

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers499

Suggested Problems

More from this Author31

Problem Tags

Community Treasure Hunt

Players