I tryed to start in this way, but a do not went this far... ;-)
How to find the position of an element in a vector without using the find function
Convert a numerical matrix into a cell array of strings
Back to basics 23 - Triangular matrix
Reindex a vector
Symmetry of vector
Fill a zeros matrix
Remove the two elements next to NaN value
Join Strings with Multiple Different Delimiters
Make a logical diamond using GALLERY function
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