This function is generic; method functions can be written to handle
specific classes of objects. Classes which already have methods for
this function include
lmList and
lme.
USAGE:
fixef(object, ...)
fixed.effects(object, ...)
REQUIRED ARGUMENTS:
object
any fitted model object from which fixed effects
estimates can be extracted.
OPTIONAL ARGUMENTS:
...
some methods for this generic function require additional
arguments.
VALUE:
will depend on the method function used; see the appropriate documentation.