[R] How to use external image with R plot?

[Greg Snow]

You can use the locator function to retrieve the user coordinates of a
point that you click on in the plot, then use those points with
rasterImage to add the image.  So replace the last 2 lines of
Michael's answer with something like:

> barplot(VADeaths, border = "dark blue")
> tmp <- locator(1)
> rasterImage(x, tmp$x - 1, tmp$y - 10, tmp$x, tmp$y + 10)




On Tue, Jul 10, 2012 at 8:05 PM, Manish Gupta <mandecent.gupta at gmail.com> wrote:
> Hi,
>
> I need to position arrow according to content of data dynamically. let's say
> i have vector c(2,3,56,9) and i need to put arrow at 56 dynamically.  How
> can i use above method.
>
> Regards
>
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-- 
Gregory (Greg) L. Snow Ph.D.
538280 at gmail.com