I'd suggest adding test cases in which n (or abs(n)) is larger than the dimension of x; for example, x is a 4-by-4 matrix and n = 6.
smooth~ basically same idea, my solution however is bit of inflexible.
Will work also for non-square input matrix x.
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Area of an Isoceles Triangle
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Find my secret function I
Who have the chance?
Relation between functions "dec2bin" & "dec2binvec"
Find the maxmum value of N*N Matrix
Find my secret function II
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