Start with something like this:
pairs(iris, panel= function(x,y,...){
points(x,y);
abline(lm(y~x))})
Then substitute in your data and extra args and any other enhancements
you want.
Hope this helps,
--
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
[EMAIL PROTECTED]
(801) 408-8111
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On Behalf Of Alan S Barnett
> Sent: Thursday, July 19, 2007 3:51 PM
> To: [email protected]
> Subject: [R] Trend lines on a scatterplot matrix
>
> I'm using pairs() to generate a scatterplot matrix;
>
> pairs(~
> Fuzzy.gray.white.ratio+Fuzzy.gw.t.score+AgeWhenTested+signal_m
> ean.noise,
> data=datam,subset=status=="control",main="Controls",
> labels=c("G/W","Peak Separation","Age","S/N"))
>
>
> How can I add regression lines to the plots?
>
> ______________________________________________
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
