Problem 56155. Return the middle element of an NxN square matrix where N is odd

Arunika

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Let's say you are given an NxN square matrix where N is always going to be an odd number:
x = [ 1 2 3
      4 5 6 
      7 8 9 ]
Your function should return 5.
Edge Case: Your solution must be able to handle empty matrices, and return a NaN in that case like:
% Input Matrix
x = []
% Correct answer returned by your function
y = NaN

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63 Solutions

27 Solvers

Last Solution submitted on Feb 18, 2026

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Christian Schröder on 11 Nov 2022

The problem description doesn't match the test suite --- the input matrix can in fact be non-square.

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