ggplot2: annotated horizontal lines

 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)

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


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