[R] Adding horizontal lines to Boxplot

[Petr PIKAL]

Hi

r-help-bounces at r-project.org napsal dne 19.10.2007 11:24:23:

> 2007/10/19, Frede Aakmann Tøgersen <FredeA.Togersen at agrsci.dk>:
> >
> > So where is the reproducable example?
> >
> > How can we know that you're not doing
> >
> > boxplot(1:10)
> > abline(h = 400, col = "red")?
> >
> > best regards
> >
> > Frede
> 
> 
> You are right, a  reproducable example  should have been there.
> 
> I don't know what I mistyped but  I got to work and here is an example 
that
> works,
> 
> boxplot(3.2:5.2, 1.9:3.9,3.9:5.9)
> abline(h = 4)
> abline(h = 2.5, col = "green")
> abline(h = 2, col = "red")
> abline(h = 5.5, col = "green")
> abline(h = 6, col = "red")
> 
> I also tested with the lwd parameter of the abline
> 
>  boxplot(3:5, 2:4,4:6)
>  abline(h = 4)
>  abline(h = 2.5, col = "red", lwd = 2)
>  abline(h = 5.5, col = "red", lwd = 2)
> 
> Is it possible to scale the size of the boxplot, so that scale on the Y 
axis
> is say from 0 to 8 instead of 2 to 6 as it is in the example from above.

You can set any limits to axes by xlim or ylim commands, so in your case

boxplot(..., ylim=c(0,8))

Look also at ?par where you can find various parameter which can be used 
in plot commands.
And maybe also to ?bxp help page which gives you plenty of other options 
how to customise your plot.

Regards
Petr

> 
> 
> 
> -- 
> Klaus F. Østergaard, <farremosen(at)gmail dot com>
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