On May 12, 2010, at 11:57 AM, xin wei wrote:
I am doing very regular stuff like the following:
attach(wtana)
fm<- lm(Body.Wt.on.SD1~Heart.Wt, data=wtana)
#fm<- lm(wtana$Body.Wt.on.SD1~wtana$Heart.Wt)
lrf<- loess(Body.Wt.on.SD1~Heart.Wt, wtana)
#lrf<- loess(wtana$Body.Wt.on.SD1~wtana$Heart.Wt)
plot(Body.Wt.on.SD1,Heart.Wt)
#plot(wtana$Body.Wt.on.SD1,wtana$Heart.Wt)
#lines(spline(Heart.Wt,fitted(lrf)), col=2)
abline(fm, col=4)
however, the abline just refuse to to show up in the scatter cloud.
Does anyone has clue?
I don't know that abline has a method for lm objects.
> methods(abline)
no methods were found
Warning message:
In methods(abline) : function 'abline' appears not to be generic
Have you tried using coef(lm) as your argument to abline? (Untested
in the absence of a cut-and-pastable example.)
thanks
--
David Winsemius, MD
West Hartford, CT
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