This solution is correct to within eps, but the test is expecting exact agreement. That is not good programming when dealing with floating point numbers.
Find the two-word state names
First non-zero element in each column
Criss_Cross_000 : Unique elements in a Square array
String permutations on phone keyboard
Join Strings with Multiple Different Delimiters
Wayfinding 4 - Crossing, level 2
Mmm! Multi-dimensional Matrix Multiplication
Insert structure in a parameter-cell array.
Create incremental spiral WITHOUT USING EVAL or FEVAL
Wayfinding 3 - passed areas
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