The author intenionally hide some info about the website's matlab code, since both of fomula and code calculate M4 with slightly different way, in Cody, you DO NOT NEED to minus the mean of P, unlike this website's code actually did that. I learned that in hard way, but deeply hope you guys enjoy to optimize this code.
random picture with random colours
Matrix indexing with two vectors of indices
Getting the indices from a vector
Will there be a new leader?
From a given cell array of strings, extract the non-unique strings.
Sum the entries of each column of a matrix which satisfy a logical condition.
Reassign cell contents to empty variables, preserving cell content data type
Replace all zeros and NaNs in a matrix with the string 'error'
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