# $Id: variogram.formula.q,v 1.8 2006-02-10 19:01:07 edzer Exp $
"variogram.formula" <-
function (object, locations = coordinates(data), data, ...)
{
# gstat.formula takes care of the case where locations contains
# both data and coordinates --- see there.
## ret = gstat.formula(object, locations, data)
## variogram(object = ret$y, locations = ret$locations, X = ret$X, ...)
g = gstat(formula = object, locations = locations, data = data)
variogram(g, ...)
}