Problem 2350. What is Sum Of all elements of Matrix

Vishal

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Given the matrix x, return the sum of all elements of matrix.

Example:

 Input  x = [ 1 2 0 0 0
              0 6 9 3 3 ]
 Output y is 24.

 Input  x = [ 1 NaN 0 0 0
              0 6 9 3 3 ]
 Output y is NaN.

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579 Solutions

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Last Solution submitted on Feb 17, 2026

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Guillaume on 8 Sep 2014

isequal(NaN, NaN) always return false. By definition Nans are not equal to each other. If you want test that a result is NaN, either use isnan, or use isequaln

Grzegorz Knor on 8 Sep 2014

The problem is unsolvable due to the second test.

Zikobrelli on 8 Sep 2014

isequalwithequalnans

Abdullah Caliskan on 8 Sep 2014

I agree guys! something wrong

J.R.! Menzinger on 8 Sep 2014

please use the function: isequalwithequalnans
;-)

Ned Gulley on 9 Sep 2014

Thanks for the suggestions. I fixed with isequalwithequalnans.

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