Converts several objects of the same class to a common format so that they can be combined or compared.
harmonise(…)
harmonize(…)Any number of objects of the same class.
A list, of length equal to the number of arguments …,
  whose entries are objects of the same class.
  If the arguments were named (name=value) then the return value
  also carries these names.
This generic command takes any number of objects of the same
  class, and attempts to make them compatible in the sense
  of compatible so that they can be combined or compared.
There are methods for the classes "fv"
  (harmonise.fv)
  and "im" (harmonise.im).
All arguments … must be objects of the same class.
  The result will be a list, of length equal to the number of
  arguments …, containing new versions of each of these
  objects, converted to a common format.
  If the arguments were named (name=value) then the return value
  also carries these names.