Insert a size 1 axis into the data array.
See also
flip, squeeze, transpose
Specify the position amongst the data array axes where the new axis is to be inserted. By default the new axis is inserted at position 0, the slowest varying position.
i : bool, optional
None
>>> v.expand_dims(2) >>> v.expand_dims(-1)
cf.CoordinateBounds.equals
cf.CoordinateBounds.fill_value
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