On Mon, 10 Mar 2003, Roger Koenker wrote: > I'm in the very initial stage of expanding the formula processing > in my quantile regression function rq() to handle additive > nonparametric components, say qss(x), or qss(x,z). I need some > advice about strategy for formula processing. My initial foray > was to use: > > terms(formula,specials="qss") > > and then modify the components of the resulting > terms.object.
Another approach, which you can see in coxph() in the survival package, is to create a new formula without the qss terms. It's not very pretty but it seems to work portably. -thomas ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help