Objects of class "fv" are returned by
Fest, Gest,Jest,
and Kest along with many other functions.
See plot.fv for plotting an "fv" object.
See as.function.fv to convert an "fv" object
to an R function.
Use cbind.fv to combine several "fv" objects.
Use bind.fv to glue additional columns onto an existing
"fv" object.
Undocumented functions for modifying an "fv" object
include fvnames, fvnames<-,
tweak.fv.entry and rebadge.fv.