[R] effects package --- add abline to plot

[John Fox]

Dear Paul,

I can't think of a way to do what you want using the plot() methods provided
by the package. (You don't say what kind of model you're fitting, but this
is true for all of the plot() methods.) On the other hand, as described in
?effect, the object returned by effect() contains all of the information
needed to construct a custom graph, and you should be able to easily get
what you want.

I hope this helps,
 John

------------------------------
John Fox, Professor
Department of Sociology
McMaster University
Hamilton, Ontario, Canada
web: socserv.mcmaster.ca/jfox


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
On
> Behalf Of Prew, Paul
> Sent: April-28-09 12:00 AM
> To: r-help at r-project.org
> Subject: [R] effects package --- add abline to plot
> 
> Hello,  I am not having success in a simple task.  Using the effects
package,
> I would like to add reference lines at probability values of 0.1 b