R help - Jun 2007 - Highliting a text in a plot

Hi everyone,

I want to highlight something in a plot.
So I want to write a text with a yellow background.


I tried to make use of text(x,y,"hallo",bg="yellow")
but that does not work. 

I know I am a handful. Sorry!

Maja!
--

Maja:

This will work. It's quick.  It's easy.  And it probably isn't what
you want
because there is room for an unplotted symbol on the left.  But it might
suffice.

plot(NA, xlim=0:1, ylim=0:1)## 

legend(x=0.5, y = 0.5, "hallo", bg="yellow", col="dark
blue", box.lty=0)

You can look at the code for legend (?legend) and modify it, or use parts of
it for your own function.

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 stat.math.ethz.ch
[mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of "Maja
Schr?ter"
Sent: Saturday, June 23, 2007 4:55 PM
To: r-help at stat.math.ethz.ch
Subject: [R] Highliting a text in a plot

Hi everyone,

I want to highlight something in a plot.
So I want to write a text with a yellow background.


I tried to make use of text(x,y,"hallo",bg="yellow")
but that does not work. 

I know I am a handful. Sorry!

Maja!
--

______________________________________________
R-help at stat.math.ethz.ch 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.

How about this:

hilight <- function(x,y,s, bg="yellow") {
    text.width <- strwidth(s)
    text.height <- strheight(s)
    rect(x,y,x+text.width,y+text.height,col=bg,border=NA)
    text(x,y,s,adj=c(0,0))
}

plot(1:10,1:10,type="b")
hilight(4,4,"Point")


On 23/06/07, "Maja Schr?ter" <maja.schroeter at gmx.de>
wrote:
> Hi everyone,
>
> I want to highlight something in a plot.
> So I want to write a text with a yellow background.
>
>
> I tried to make use of text(x,y,"hallo",bg="yellow")
> but that does not work.
>
> I know I am a handful. Sorry!
>
> Maja!
> --
>
> ______________________________________________
> R-help at stat.math.ethz.ch 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.
>

-- 
================================David Barron
Said Business School
University of Oxford
Park End Street
Oxford OX1 1HP