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)
How to find the position of an element in a vector without using the find function
Find the sum of the elements in the "second" diagonal
Back to basics 8 - Matrix Diagonals
Back to basics 18 - justification
Return elements unique to either input
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Create a matrix X, where each column is a shifted copy of the vector v
Remove NaN ?
First non-zero element in each column
vectorization in N
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