precision issues, a single test case, meaningless "not using built-in functions" limitation, and somewhat taunting "have a pride" exhortation... please do the same and put some more thought into your problem
Updated TSuite now
Humm. the test suite is actually requesting Gaussian elimination, not LU decomposition. You may check it by using [L,U] = lu(x). They are very similar processes, but not exactly the same.
Not a built in function, but still a very cheesy answer! :-)
I see you! hahahaha
Which doors are open?
Solving a quadratic equation
Create matrix of replicated elements
Rotate array 90 degrees
Modified run-length companion vector
Rotate matrix by -90 degrees
Convert degrees to radians
Encode Me From The Past
Create sine function out of cosine
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