[R] help overlay scatterplot to effects plot

[Greg Snow]

We cannot reproduce your example, don't have the data (or don't know where it is if we do) and where did the allEffects function come from?

If this just makes a regular plot using base graphics and not messing with the user coordinates, then you can just use the points function to add additional points to the plot.

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
801.408.8111


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-
> project.org] On Behalf Of Anderson, Chris
> Sent: Tuesday, May 04, 2010 11:06 AM
> To: 'r-help at R-project.org'
> Subject: [R] help overlay scatterplot to effects plot
> 
> I have a process where I am creating a effects plot similar to the
> cowles effect example. I would like to add the point estimates to the
> effects plot, can someone show me the correct syntax. I have included
> the "R" effects example, so you can show me the correct syntax. Thanks
> 
> 
> 
> mod.cowles <- glm(volunteer ~ sex + neuroticism*extraversion,
> 
>     data=Cowles, family=binomial)
> 
> eff.cowles <- allEffects(mod.cowles, xlevels=list(neuroticism=0:24,
> 
>     extraversion=seq(0, 24, 6)), given.values=c(sexmale=0.5))
> 
> eff.cowles
> 
> plot(eff.cowles, 'neuroticism:extraversion', ylab="Prob(Volunteer)",
>     ticks=list(at=c(.1,.25,.5,.75,.9)))
> 
> 
> Chris Anderson
> Data Analyst
> Medical Affairs
> wk: 925-677-4870
> cell: 707-315-8486
> Fax:925-677-4670
> 
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