This is the same as Problem 12.
This solution returns f(0) = 1, which contradicts the decription of the given problem.
This solution uses filter from the Signal Processing Toolbox.
Yes, it uses filter, but filter is indeed not a toolbox function, but a built-in function. You can fix the error by changing f=y(n-2) to f = y(n)
... and then change first input of filter to [1,-1] and remove +1 from the end of the line.
Test suite is flawed. I had to add a round(x,0) function to the output to make it pass.
Test is correct. Fibonacci Numbers are integers, so your output should be to.
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