[R] problem with using lines command on windows XP machine

[Edwin Commandeur]

Hi Petr and Eric,

Thanks for your comments.

To plot a vertical line, using "lines(0)" does not work, but

lines(c(-1,0),c(0,1))

does the work in my simple test example. I just interpreted the ?lines
documentation wrong.

So the "lines" command does work on my pc. Off course "abline(v=0)" will
also do the job in this specific example...

Sorry for the trouble,

Edwin

-----Original Message-----
From: Petr Pikal [mailto:petr.pikal at precheza.cz]
Sent: donderdag 5 januari 2006 13:32
To: Edwin Commandeur; r-help at stat.math.ethz.ch
Subject: Re: [R] problem with using lines command on windows XP machine


Hi

On 5 Jan 2006 at 11:27, Edwin Commandeur wrote:

From:           	"Edwin Commandeur" <e.commandeur at uvt.nl>
To:             	<r-help at stat.math.ethz.ch>
Date sent:      	Thu, 5 Jan 2006 11:27:01 +0100
Subject:        	[R] problem with using lines command on windows XP machine

> Hello,
>
> I'm using R version 2.2.0 installed on windows XP machine, with SP2
> (maybe it's also interesting to note it's laptop, so it outputs to a
> laptop screen) a l and I wanted to draw a line in a graph, but it does
> not seem to work.
>
> To test it I use the following code:
>
> x = c(-1,0,1)
> y = c(-1,0,1)
> plot(x,y, type="l", xlim=c(-1,1), ylim=c(-1,1))
> lines(0)

quite close

abline(v=0)

draws a vertical line at x=0

from help page
Arguments:

    x, y: coordinate vectors of points to join.

Maybe to mention abline in See also of lines help page could be good

HTH
Petr



>
> If I understand the documentation right this should draw a line (with
> default settings, I'm not setting any parameters) at x=0.
>
> I tried goofing around a bit setting linewidth and color differently,
> I tried using xy.coords etc, but no line appeared in the graph.
>
> The commands abline and segments work perfectly fine (so I am now
> using segments to plot the line I want), but I still think the lines
> command should work.
>
> Does anybody has similar problems drawing lines on XP machines (or
> laptops in general?)? Or I am doing something abominably wrong?
>
> Greetings and thanks in advance for any replies,
> Edwin Commandeur
>
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Petr Pikal
petr.pikal at precheza.cz