# cf.FieldList.concatenate

`FieldList.``concatenate`(axis=0, _preserve=True)

  Join a sequence of fields together.

  This is different to `cf.aggregate` because it does not account for all metadata. For example, it assumes that the axis order is the same in each field.

  New in version 1.0.

  See also

  `cf.aggregate`, `cf.Data.concatenate`

  Parameters: | axis: `int`, optional
  Returns: | out: `cf.Field`
  Examples: |