[R] Drawing functions on Cartesian coordinate systems

[Greg Snow]

I think he wants the axes crossing at 0,0 not on the outer edges like
the default.

You can put the axes in the plot (though it tends to distract rather
than help in many cases) by:

> axis(1, pos=0)
> axis(2, pos=0)

You will need to draw the arrowheads yourself.  There are options (under
?par) for tick length and how to suppress the default axes.

Hope this helps,

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at intermountainmail.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 Charles Annis, P.E.
> Sent: Friday, September 28, 2007 11:32 AM
> To: 'Paul Smith'; 'r-help'
> Subject: Re: [R] Drawing functions on Cartesian coordinate systems
> 
> Yes, R can do that.  Well, actually YOU can do that using R.
> 
> But it is hard to believe that you looked very hard before 
> writing.  Did you look at these R functions?
> 
> ?plot
> ?line
> ?points
> ?arrows
> 
> 
> 
> Charles Annis, P.E.
> 
> Charles.Annis at StatisticalEngineering.com
> phone: 561-352-9699
> eFax:  614-455-3265
> http://www.StatisticalEngineering.com
>  
> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Paul Smith
> Sent: Friday, September 28, 2007 1:12 PM
> To: r-help
> Subject: [R] Drawing functions on Cartesian coordinate systems
> 
> Dear All,
> 
> Can R draw plots of functions on a Cartesian coordinate 
> system with axes like the ones shown at
> 
> http://en.wikipedia.org/wiki/Image:Cartesian-coordinate-system
> -with-circle.s
> vg
> 
> ?
> 
> I have already searched the R web-site, but found nothing.
> 
> Thanks in advance,
> 
> Paul
> 
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> ______________________________________________
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> PLEASE do read the posting guide 
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> and provide commented, minimal, self-contained, reproducible code.
>