Problem 2094. Sum of diagonals elements of a matrix

Created by Swapnali Gujar

Solve Later

Given a matrix, return the sum of all the elements across the diagonals.

E.g. A = [1 2 3; 4 5 6; 7 8 9;]

then, sum = 25 as sum of (1, 3, 7, 9,5)

Solve

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485 Solutions
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Last Solution submitted on Jul 04, 2020

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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.

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diagonals sum

Problem 2094. Sum of diagonals elements of a matrix

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Problem 2094. Sum of diagonals elements of a matrix

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Last 200 Solutions

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