OK. I'll bite. Where did this formula come from?
Just from calculating a number of values and figuring out the pattern.
That's quite the pattern to figure out...
Extract leading non-zero digit
Create a square matrix of multiples
Generate a random matrix A of (1,-1)
Who is the smartest MATLAB programmer?
Generate this matrix
Find the mean of a 2-D matrix after excluding elements of specified sub-matrix
Get a new matrix by mapping each element of an arbitrary-sized input matrix using lookup table
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