for an n-dimensional vector x, the function should return another vector 2n-dimension which each element is repeated twice.
in->[2 3 NaN 5] and out->[2 2 3 3 NaN NaN 5 5]
improve test suit
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)
Test for balanced parentheses
Back to basics 21 - Matrix replicating
find the maximum element of the matrix
Deleting an element in a matrix
A quadrant matrix
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Matrix with different incremental runs
Remove NaN ?
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