very cool question: learn some new tricks, and get 10 points, why not?!
Hint to spare the pain : string(NaN)==
Whether the input is vector?
Get the length of a given vector
02 - Vector Variables 5
String Array Basics, Part 4: Convert String Array with Missing Values to Cell Array
String Array Basics, Part 1: Convert Cell Array to String Array; No Missing Values
Generating random matrix with given probability mass function
Words Count: A Cell Array Approach
Cody meets Xiangqi: foresee the unseen (Part 1)
Fast 1-D Convolution (same shape)
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