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)
Sums with Excluded Digits
Test for balanced parentheses
First non-zero element in each column
Calculate the area of a triangle between three points
Connect blocks in a model
Matrix with different incremental runs
vectorization in N
Remove NaN ?
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
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