Problem 792. Set some matrix elements to zero

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>First get the maximum of each</w:t></w:r><w:r><w:t> </w:t></w:r><w:r><w:rPr><w:b/></w:rPr><w:t>row</w:t></w:r><w:r><w:t>, and afterwards set all the other elements to zero. For example, this matrix:</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\n5   5   6   5\n7   9   8   3]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>should become:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[0   0   0   4\n0   0   6   0\n0   9   0   0]]></w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>Input will never be empty.</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>If a row has the same maximum in different columns , display the first occurrence:</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"text\"/></w:pPr><w:r><w:t>In the below example, the second row has twice the number 8 as maximum , the output will display the first 8 (column2) :</w:t></w:r></w:p><w:p><w:pPr><w:pStyle w:val=\"code\"/></w:pPr><w:r><w:t><![CDATA[   x =\n\n       5     4     5\n       2     8     8\n\n   should become :\n\n     5     0     0\n     0     8     0]]></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

1080 Solutions
330 Solvers

Last Solution submitted on Jan 08, 2022

Last 200 Solutions

Problem Comments

Solution Comments

Solution 1222184

1 Comment

1 Comment

David Verrelli on 4 Feb 2018

Hack.

Solution 283706

2 Comments

2 Comments

David Verrelli on 4 Feb 2018

"regexp" hack.

ASHOK MALLAGUNTA on 9 Nov 2018

please check this code
problem : right angle or not
function flag = isrightangle(a,b,c)
if (c^2 == (b^2+a^2))
flag ='true'
else
flag = 'false'
end
end

Solution 103409

2 Comments

2 Comments

Christopher on 27 Jun 2012

Problem specification says nothing about more than one value in a row equaling the row max. Cases 5 or 6 should be included in the specification.

Aurelien Queffurust on 27 Jun 2012

Thanks for the comment . I have just updated the description.

Problem Recent Solvers330

Problem Tags

indexing matrix

Community Treasure Hunt

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

Start Hunting!

Problem 792. Set some matrix elements to zero

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers330

Suggested Problems

More from this Author30

Problem Tags

Community Treasure Hunt

Problem 792. Set some matrix elements to zero

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers330

Suggested Problems

More from this Author30

Problem Tags

Community Treasure Hunt

Players