The problem description is broken(?) and you have mentioned the code in the test suite (you might want to remove that)
The test suite has had the "solution" code removed. The description was also cleaned up. (If it's not loading, simply reload the page.) I'm not sure how much these fixes help, though...
Back to basics 14 - Keywords
Determine Whether an array is empty
Find and replaces spaces from a input string with *
Find the product of a Vector
Replace every 3rd element in a vector with 4
remove nans fast
Convert a Cell Array into an Array
Magic Concentric Circles
Strange Number Algorithms
Convert vector datasets to plot with imagesc instead of scatter
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