# cf.CellMethods.within

`CellMethods.``within`

  Each cell method’s within keyword.

  These describe how climatological statistics have been derived.

  See also

  `over`

  Examples: |

      >>> c = cf.CellMethods('time: minimum area: mean')
      >>> c
      <CF CellMethods: time: minimum time: mean>
      >>> c.within
      (None, None)
      >>> c[0].within = 'years'
      >>> c[1].over = 'years'
      >>> c
      <CF CellMethods: time: minimum within years area: mean over years>
      >>> c.within
      >>> ('years', None)
      >>> del c[0].within
      >>> c
      <CF CellMethods: time: minimum time: mean over years>
      >>> c.within
      >>> (None, None)