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)
Distance walked 2D
Factorize THIS, buddy
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Find nearest prime number less than input number
Create a matrix X, where each column is a shifted copy of the vector v
A quadrant matrix
Matrix which contains the values of an other matrix A at the given locations.
First non-zero element in each column
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