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.gu...@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 > > -- > View this message in context: > http://r.789695.n4.nabble.com/How-to-use-external-image-with-R-plot-tp4635959p4636088.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > R-help@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. -- Gregory (Greg) L. Snow Ph.D. 538...@gmail.com ______________________________________________ R-help@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.
