plot(<lm>): new behavior in R-2.2.0 alpha

-----Original Message-----
From: Werner Stahel [mailto:stahel at stat.math.ethz.ch] 
Sent: Friday, September 16, 2005 2:37 AM
To: Martin Maechler
Cc: R-devel at stat.math.ethz.ch; John Maindonald; Werner 
Stahel; John Fox
Subject: Re: plot(<lm>): new behavior in R-2.2.0 alpha

For most plots, I like to see a smoother along with the points.
I suggest to add the option to include smoothers, not only as 
an argument to plot.lm, but even as an option().

I clearly support to add either vif or -- equivalent and more 
intuitive to me -- R^2_j, the coefficient of determination of
lm(X_j~.) However
-- this should be included in the coefficient table of print.lm
-- this adds another useless and misleading quantity for 
dummy x-variables It is therefore quite a different question.