Given input A, return all but the first and last elements, arranged as a column vector. (I.e., all dimensions after the first should be singleton.)
For example,
>> middleAsColumn(eye(3)) ans = 0 0 0 1 0 0 0
The test suite should include a two element input also, for the sake of completion!
Why are several y_correct vectors not column vector as required by the problem?
The leading solution without the regexp hack: 19.
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Solving Quadratic Equations (Version 1)
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