This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
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Differences

Differences[list]
gives the successive differences of elements in list.
Differences[list, n]
gives the n^(th) differences of list.
Differences[list, {n1, n2, ...}]
gives the successive nk^(th) differences at level k in a nested list.
  • Differences[m, {1, 0}] or Differences[m, 1] finds the successive differences of rows in a 2D array or matrix m. Differences[m, {0, 1}] finds the differences of columns.
New in 6