Hi, I am using gogarch from the package "gogarch". i have 13 series. the univariate model for the one of the series has a statistically insignificant constant term (garch(1,1)). so I want to re fit the model assuming the constant term top be zero....can i use "update" method to do so....if not please help me out. regards -- View this message in context: http://r.789695.n4.nabble.com/How-to-use-Update-for-an-object-of-clss-GOGARCH-tp3647817p3647817.html Sent from the R help mailing list archive at Nabble.com.