MathGroup Archive 2003

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nth differences


Say I have a list of k integers and I want to produce a list containing the
first differences?  For example, given {1, 2, 5, 7, 8, 9} the first
differences are {1, 3, 2, 1, 1}, and the second differences are {2, -1, -1,
0}, the third are {-3, 0, 1}, etc




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