Problem 760. Duplicate each element of a vector.

for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice. Example : in->[2 3 NaN 5] and out->[2 2 3 3 NaN NaN 5 5]

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64.62% Correct | 35.38% Incorrect
Last Solution submitted on Dec 11, 2025

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poor_test_suite vectors

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