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...
Read a column of numbers and interpolate missing data
Clean the List of Names
Increment a number, given its digits
Getting the indices from a vector
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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