What you're looking for is not called the "characteristics equation", but the characteristic polynomial.
More test cases, please. ;-)
middleAsColumn: Return all but first and last element as a column vector
Make a random, non-repeating vector.
Find the area of a rectangle if length of the diagonal is given.
Matlab Basics - Rounding II
MATLAB Basic: rounding IV
Compute LOG(1+X) in natural log
Find out Harmonic mean.
Convert decimal to hex as shown in test cases
Find out value of sine given by degree.
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