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]
This solution only works for vectors that are already sorted from low to high :) but it passed the test suite
This works in R2012b, but not on cody
function ans = duplicate(x)
[x;x];
x(:)';
end
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Solution 489792
improve test suit