Back to basics 9 - Indexed References
Return the first and last character of a string
Remove from a 2-D matrix all the rows that contain at least one element less than or equal to 4
Solving Quadratic Equations (Version 1)
Reassign cell contents to empty variables, preserving cell content data type
Sum the entries of each column of a matrix which satisfy a logical condition.
Replace all zeros and NaNs in a matrix with the string 'error'
Compute the cokurtosis of a given portfolio.
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