very cool question: learn some new tricks, and get 10 points, why not?!
Hint to spare the pain : string(NaN)==
Finding Perfect Squares
What is the distance from point P(x,y) to the line Ax + By + C = 0?
Return the first and last character of a string
Solving Quadratic Equations (Version 1)
Matlab Basics II - Minimum
Apply Function to Each Field of a Structure Array: Part 1
Histogram of histogram
Fast 1-D Convolution (valid shape)
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