Problem 2094. Sum of diagonals elements of a matrix

Created by Swapnali Gujar

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 a matrix, return the sum of all the elements across the diagonals.</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>E.g. A = [1 2 3; 4 5 6; 7 8 9;]</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, sum = 25 as sum of (1, 3, 7, 9,5)</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

573 Solutions
170 Solvers

Last Solution submitted on Mar 16, 2021

Last 200 Solutions

Problem Comments

2 Comments

2 Comments

Jon on 31 May 2014

Basically the same as Problem 1158

Jong-Min Kwak on 4 Dec 2016

good!!

Solution Comments

Solution 1601578

1 Comment

1 Comment

A C on 6 Aug 2018

only the odds.

Solution 381457

2 Comments

2 Comments

Tim on 8 Jan 2014

Works for current test suite, but not in general.

James on 8 Jan 2014

Try adding an even sized matrix (magic(6), for instance) to the test suite. If the two diagonals don't share any points, a lot of these solutions won't work.

Solution 381456

1 Comment

1 Comment

Jean-Marie Sainthillier on 9 Feb 2014

First time I see this notation.

Problem Recent Solvers170

Problem Tags

diagonals sum

Community Treasure Hunt

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

Start Hunting!

Problem 2094. Sum of diagonals elements of a matrix

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers170

Suggested Problems

More from this Author25

Problem Tags

Community Treasure Hunt

Problem 2094. Sum of diagonals elements of a matrix

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers170

Suggested Problems

More from this Author25

Problem Tags

Community Treasure Hunt

Players