Given a ColorSpec string, either in short or long form, return the corresponding RGB triplet. If the input is not a valid color, return an empty vector.
str2rgb('red') returns [1 0 0]
str2rgb('k') returns [0 0 0]
str2rgb('pizza') returns 
When I see beautiful and efficient Ly Cao solutions, I have the feeling that Cody has found another master (after Alfonso).
Thank you. I'm flattered. I still have a lot to learn.
Numbers with prime factors 2, 3 and 5.
Colon operator of two vectors
Try 1.5.4: Celsius to Fahrenheit
Number of Even Elements in Fibonacci Sequence
Find the nearest prime number
Repeat middle rows and columns of an array
Check if vertices form a rectangle
Create cell array of numeric arrays
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