R help - Mar 2009 - ggplot2: annotated horizontal lines

Hello,

I'm using geom_hline to add a minimum line to my plot (representing  
the best solution found so far by a search algorithm). I'd like to  
annotate this line with it's numerical value to save trying to read it  
off the graph, but I can't see a clear way to do this - any ideas?

(Alternatively, if this is against the spirit of the grammar of  
graphics, is there a better way to represent the information?)

Cheers,
dave


-- 
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.

What's wrong with geom_text?
>  my.value = 0.65
>  qplot(1,1)+geom_hline(v=0)+
> 	geom_text(mapping=aes(x=1,y=0),label=paste(my.value),vjust=-1)

baptiste

On 3 Mar 2009, at 18:10, Dave Murray-Rust wrote:
> Hello,
>
> I'm using geom_hline to add a minimum line to my plot (representing
> the best solution found so far by a search algorithm). I'd like to
> annotate this line with it's numerical value to save trying to read it
> off the graph, but I can't see a clear way to do this - any ideas?
>
> (Alternatively, if this is against the spirit of the grammar of
> graphics, is there a better way to represent the information?)
>
> Cheers,
> dave
>
>
> --
> The University of Edinburgh is a charitable body, registered in
> Scotland, with registration number SC005336.
>
> ______________________________________________
> R-help at r-project.org 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.
_____________________________

Baptiste Augui?

School of Physics
University of Exeter
Stocker Road,
Exeter, Devon,
EX4 4QL, UK

Phone: +44 1392 264187

http://newton.ex.ac.uk/research/emag