[R] Plot 1:1 relationship

[Greg Snow]

In addition you may want to include asp=1 and pty='s' to the plot command.

-- 
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 Sarah Goslee
> Sent: Friday, January 28, 2011 10:53 AM
> To: Peter Francis
> Cc: r-help at r-project.org
> Subject: Re: [R] Plot 1:1 relationship
> 
> abline() takes the intercept and slope, which for a 1:1 relationship
> are 0 and 1, respectively.
> So:
> abline(0, 1)
> 
> Sarah
> 
> On Fri, Jan 28, 2011 at 10:42 AM, Peter Francis <peterfrancis at me.com>
> wrote:
> > Dear list,
> >
> > I am looking to plot a line on a graph to show the 1:1 relationship,
> in order to demonstrate the pattern i have observed is off the line,
> however i am unsure. I have tried abline but i can not see a function
> to plot the 1:1?
> >
> >
> > Any help would be greatly appreciated
> >
> > #generate data
> > y <- rnorm(30, mean=1.5, sd= 0.005)
> > x <- rnorm(30, mean=1.5, sd= 0.005)
> > plot(x,y)
> >
> > Thanks,
> >
> > Peter
> >
> > ______________________________________________
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> guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> >
> 
> 
> 
> --
> Sarah Goslee
> http://www.functionaldiversity.org
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-
> guide.html
> and provide commented, minimal, self-contained, reproducible code.