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)
Implement a ROT13 cipher
Replicate elements in vectors
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Remove the positive integers.
Find the elements of a matrix according to a defined property.
Matrix with different incremental runs
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Matrix which contains the values of an other matrix A at the given locations.
Create a matrix X, where each column is a shifted copy of the vector v
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