[R] Add qqline to plot.lm Q-Q plot?

[Kjetil Kjernsmo]

Dear all,

Is there a simple way to add a qqline to the Q-Q plot plot.lm() produces
for which = 2? 

If not, I might write one, but how should this preferably be
implemented? Make qqline() generic and add a qqline.lm() method? Add
an argument to plot.lm()? Have plot.lm() output something invisibly
that qqline() can chew directly? Have plot.lm() output something
invisibly that abline() can chew? Something else?

Best,

Kjetil
-- 
Kjetil Kjernsmo
Graduate astronomy-student                    Problems worthy of attack
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E-mail: kjetikj at astro.uio.no                                - Piet Hein
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