Tests whether two or more function objects (class "fv")
  are compatible.
# S3 method for fv
compatible(A, B, ..., samenames=TRUE)Logical value: TRUE if the objects are compatible, and FALSE
if they are not.
Two or more function value objects (class
    "fv").
Logical value indicating whether to check for complete agreement
    between the column names of the objects (samenames=TRUE, the
    default) or just to check that the name of the function argument
    is the same (samenames=FALSE).
Adrian Baddeley Adrian.Baddeley@curtin.edu.au
and Rolf Turner r.turner@auckland.ac.nz
An object of class "fv" is essentially a data frame
  containing several different statistical estimates of the same
  function. Such objects are returned by Kest and its
  relatives.
This command tests whether such objects are compatible
  (so that, for example, they could be added or subtracted).
  It is a method for the generic command compatible.
The functions are compatible if they have been evaluated at the
  same sequence of values of the argument r, and if the
  statistical estimates have the same names.
eval.fv