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)
The Hitchhiker's Guide to MATLAB
Back to basics 1 - Saving
letter yes yes & letter no no
Change the sign of even index entries of the reversed vector
First non-zero element in each column
Create a matrix X, where each column is a shifted copy of the vector v
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
A quadrant matrix
vectorization in N
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