[R] refering to the 'boundaries' of a graph

[John Kane]

I think what you are encountering is a standard R default.  R, by default, adds 4% to the axes. I suspect that this is to avoid graphing points right on the  x or x axis and thus obscuring them.

 Have a look at ?par xaxs for more information and how to change the default.


 
--- On Mon, 12/28/09, Dean1 <web13site at yahoo.co.uk> wrote:

> From: Dean1 <web13site at yahoo.co.uk>
> Subject: [R]  refering to the 'boundaries' of a graph
> To: r-help at r-project.org
> Received: Monday, December 28, 2009, 8:55 AM
> 
> Please see this code for a demonstration of my problem...
> 
> xlim <- c(-1,5)
> plot(1:4, xlim=xlim)
> abline(v=xlim[1])
> abline(v=xlim[2])
> 
> When I refer to xlim, it is not referring to the boundaries
> of the graphical
> region, it refers to the maximum and minimum xticks. 
> My question is how can
> I refer to the x axis boundaries (and similarly y axis) of
> the graph?
> -- 
> View this message in context: http://n4.nabble.com/refering-to-the-boundaries-of-a-graph-tp989790p989790.html
> Sent from the R help mailing list archive at Nabble.com.
> 
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