# cf.CellMeasure.unique

`CellMeasure.``unique`()

  The unique elements of the data array.

  Examples 1: |

      >>> f.unique()

  Returns: | out: `cf.Data` Returns the unique data array values in a one dimensional `cf.Data` object.
  Examples 2: |

      >>> print f.array
      [[4 2 1]
       [1 2 3]]
      >>> print f.unique().array
      [1 2 3 4]
      >>> f[1, -1] = cf.masked
      >>> print f.array
      [[4 2 1]
       [1 2 --]]
      >>> print f.unique().array
      [1 2 4]