update.gnls
object
gnls
update(object, model, data, params, start, correlation, weights, subset, na.action, naPattern, control, verbose)
fm1 <- gnls(weight ~ SSlogis(Time, Asym, xmid, scal), Soybean, weights = varPower()) fm2 <- update(fm1, correlation = corAR1( form = ~1 | Plot ))