S4 class for empirical likelihood displacement. It inherits from "numeric"
.
showClass("ELD")
#> Class "ELD" [package "melt"]
#>
#> Slots:
#>
#> Name: .Data
#> Class: numeric
#>
#> Extends:
#> Class "numeric", from data part
#> Class "vector", by class "numeric", distance 2