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# pandas.errors.DataError

exception pandas.errors.DataError

  Exception raised when performing an operation on non-numerical data.

  For example, calling `ohlc` on a non-numerical column or a function on a rolling window.

  See also

  `Series.rolling`

    Provide rolling window calculations on Series object.

  `DataFrame.rolling`

    Provide rolling window calculations on DataFrame object.

  Examples

      >>> ser = pd.Series(["a", "b", "c"])
      >>> ser.rolling(2).sum()
      Traceback (most recent call last):
      DataError: No numeric types to aggregate