very cool question: learn some new tricks, and get 10 points, why not?!
Hint to spare the pain : string(NaN)==
So many choices
Remove NaN ?
Back to basics 26 - Keywords
intersection of matrices
Calculate Amount of Cake Frosting
Words Count: A String Array Approach
Fast 1-D Convolution (valid shape)
Generating random matrix with given probability mass function
Moving Product (Easy)
String Array Basics, Part 2: Convert String Array to Cell Array; No Missing Values
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