OK. I figured out the issue with the test suite. Please check the absolute value of the difference when comparing the computed answers to the correct ones. Otherwise, you'll get some really silly answers. (Like this one! :-)
My, you are tricky, James, finding all those loopholes. I've fixed the test suite to check against upper and lower bounds of each answer.
I was just really curious why one of my answers worked when it didn't include a or b. Some experimentation and a lot of (now wrong) solutions narrowed it down. I had to use some of these equations in my senior project at college, so I knew that the dimensions were very important!
Back to basics 6 - Column Vector
Back to basics 18 - justification
Getting logical indexes
Change the sign of even index entries of the reversed vector
Slicing the cube
Self-similarity 2 - Every third term
Calculator spelling - Numbers to Letters
The 5th Root
Pattern Recognition 2 - Known Unit Length, Various Array Length (including cell arrays)
Lights Out 10 - 5x5, with wrapping, 6 moves
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