ss} First differences of the Series. See Also -------- {klass}.pct_change: Percent change over given number of periods. {klass}.shift: Shift index by desired number of periods with an optional time freq. {other_klass}.diff: First discrete difference of object. Notes ----- For boolean dtypes, this uses :meth:`operator.xor` rather than :meth:`operator.sub`. The result is calculated according to current dtype in {klass}, however dtype of the result is always float64. Examples -------- {examples} Frú