Convert the input to a cell array, but only if necessary.
If the input is a numeric array, return a 1-by-1 cell array containing the input. If the input is a cell array of numeric arrays, return the input unaltered.
Which doors are open?
Who knows the last digit of pi?
convert matrix to single column
Convert ColorSpec string to RGB triplet
Detect circles in images
Convert RGB triplet to ColorSpec string
Extra safe primes
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